French authorities have zeroed in on two men they believe were responsible for planning and launching the terrorist attacks in Paris that left at least 129 people dead.

Citing two sources close to the investigation in Paris, NPR's Dina Temple-Raston reports that officials believe Salim Benghalem, a French national who joined ISIS several years ago, directed Abdelhamid Abaaoud, an ISIS deputy and a Belgian national, to orchestrate Friday's rampage. The two men are believed to be in Syria.

Using automatic weapons and explosive devices on Friday, three well-organized teams of assailants targeted six sites across Paris, including the national stadium, a crowded concert hall and several restaurants. The Islamic State took responsibility for the attack and in a speech before both houses of Parliament, French President François Hollande said that France was "at war."

The attacks in Paris, he said, represent "an aggression against our country, against our values, against its youth and its way of life."

France, he said, will seek a United Nations resolution to fight terrorism and it will move an aircraft carrier to the Middle East as part of an effort to intensify its bombing campaign in Syria.

This morning, French Interior Minister Bernard Cazeneuve said the country has conducted 168 raids, detaining 23 suspects and putting more than 100 under house arrest.

"It's just a start," Cazeneuve said. "These operations are going to continue. The response of the Republic will be huge, will be total."

Cazeneuve said that in those raids authorities seized a huge cache of weapons, including assault rifles and rocket launchers.

Paris prosecutor François Molins said that five out of seven of the dead terrorists have been identified, but police are still on the hunt for an eighth suspect named as 26-year-old Salah Abdeslam.

We'll update this post throughout the day, so make sure to refresh the page for the latest.

Update 8:20 p.m. ET Belgium Postpones Soccer Game Amid Security Concerns:

A friendly match between Belgium and Spain set to take place Tuesday in Brussels has been postponed for security reasons. The Belgian soccer federation said that the government advised rescheduling the game due to the country's state of high alert and the fact that a suspect in Friday's attack in Paris is on the run.

Update at 7:40 p.m. ET Canadian Politician Wants To Put Canada's Syrian Refugee Plan On Hold:

The premier of the the Canadian province of Saskatchewan, Brad Wall, wants the Canadian government to suspend its plan to bring 25,000 Syrian refugees to Canada by the end of the year, CBC reports.

Mirroring statements by many U.S. governors who say they don't want Syrian refugees settled in their states, Wall sent a letter to Prime Minister Justin Trudeau calling for Canada to step back from its refugee resettlement plan.

"The recent attacks in Paris are a grim reminder of the death and destruction even a small number of malevolent individuals can inflict upon a peaceful country and its citizens," Wall wrote. "Surely, we do not want to be date-driven or numbers-driven in an endeavour that may affect the safety of our citizens and the security of our country."

Saskatchewan Opposition leader Cam Broten accused Wall of "stirring up fear," reported the CBC.

Update at 4:40 p.m. ET Obama Rejects Growing Calls To Bar Syrian Refugees From U.S.:

One Democratic governor, Maggie Hassan of New Hampshire, has now joined 18 Republican governors calling for the U.S. to halt plans for Syrian refugee resettlement. So far, the other states that reject Syrian refugee resettlement are Alabama, Arizona, Arkansas, Florida, Georgia, Illinois, Indiana, Louisiana, Maine, Massachusetts, Michigan, Mississippi, Ohio, Nebraska, North Carolina, Tennessee, Texas and Wisconsin.

Obama rebuked these moves, calling them "shameful" during remarks at a G-20 meeting in Turkey.

"The people who are fleeing Syria are the most harmed by terrorism; they are the most vulnerable as a consequence of civil war and strife," Obama said. "We do not close our hearts to these victims of such violence and somehow start equating the issue of refugees with the issue of terrorism."

The State Department has said it will not change plans to accept 10,000 refugees in 2016.

Update at 2:52 p.m. ET. Kerry Arrives In Paris:

In a show of solidarity with the French, Secretary of State John Kerry has arrived in Paris.

Kerry is scheduled to meet with French officials as well as embassy staff.

"He will reiterate America's commitment to our strong relationship with France and express our condolences as well as our shared resolve to continue countering violent extremism here and around the world," State Department Spokesperson John Kirby said.

Update at 2:11 p.m. ET. Republican Governors Reject Syrian Refugees:

Republican governors in seven states are saying they won't take Syrian refugees being resettled in the United States into their states.

In a letter to President Obama, Texas Gov. Greg Abbott asked that the president halt plans to accept more Syrian refugees.

"A Syrian 'refugee' appears to have been part of the Paris terror attack," Abbott wrote. "American humanitarian compassion could be exploited to expose Americans to similar deadly danger."

Governors from Indiana, Michigan, Mississippi, Alabama, Louisiana and Florida have made similar decisions. It's unclear whether the governors have the legal authority to exclude refugees from their states.

NPR's Brian Naylor reports that a Department of Homeland Security official tells him that "refugees are subject to the highest level of security checks of any category of traveler to the United States."

The administration, the official said, is "steadfastly committed to the President's plan to resettle at least 10,000 Syrian refugees" in fiscal year 2016.

Update at 1:50 p.m. ET. Eiffel Tower Comes To Life:

The Eiffel Tower in Paris has been dark — and closed — for the past few days. Today, however, as more Parisians took to the streets, the tower opened again to tourists and it came back to life — lit up with the colors of the French flag.

The mayor of Paris, Anne Hidalgo tweets:

That phrase — fluctuat nec mergitur — translates from Latin as "tossed but not sunk."

Update at 12:20 p.m. ET. No Intel To Backup ISIS Threats:

Earlier today Islamic State militants released a video that threatened an attack on the United States.

"We say to the states that take part in the crusader campaign that, by God, you will have a day, God willing, like France's and by God, as we struck France in the center of its abode in Paris, then we swear that we will strike America at its center in Washington," one militant says.

Citing an American law enforcement source, NPR's Carrie Johnson reports that the U.S. has no specific intelligence to back up those threats.

"U.S. authorities continue to say there is no specific or credible information about attacks here," Carrie tells us. "That said, FBI and local and state law enforcement partners have been directed to pay 'special attention' to priority cases here in the U.S. – that could mean increasing electronic and physical surveillance, for instance."

Update at 11:32 a.m. ET. Out But Jittery:

NPR's Eleanor Beardsley reports that in Paris, people are out but they are still jittery. She sends us this missive:

Boulevard Saint-Germain, usually bustling with cars and pedestrians, was eerily quiet.

A building at Sciences Po University was evacuated because of a suspicious package. It turned out to be nothing.

Some students out front said they thought everyone was overly nervous. But at the same time they understood. Many Parisians expressed the need to be out and about. "We can't stop our lives," they said.

Update at 11:03 a.m. ET. Aircraft Carrier To MidEast:

AfterHollande finished his speech to a joint session of Parliament, French politicians sang La Marseillaise, the French national anthem.

Hollande asked his parliament take up a series of issues including, amending the constitution and extending France's state of emergency from 14 days to 3 months.

Hollande said he wanted to "extend the scope" of the house arrest and administrative searches provided by the emergency declaration. Hollande also said:

-- He would seek a resolution from the United Nations to fight terrorism.

-- He would invoke a provision of the European Union that provides backup when a member-nation is attacked.

-- He would move an aircraft carrier from France to the Middle East.

-- He would intensify France's bombing campaign in Syria.

-- He would consult with the United States and Russia to "fight against ISIS within the framework of a coalition."

-- The U.N. Climate Change Conference scheduled for Paris at the end of the month will go as planned in what Hollande said would be a "moment of hope and solidarity."

Hollande closed by saying: "Terrorism will not destroy the Republic, because it is the Republic that will destroy terrorism. Long live the Republic; long live France."

Update at 10:30 a.m. ET. 'France Is At War':

"France is at war," French President François Hollande told a joint meeting of Parliament. The attacks in Paris, he said, represent "an aggression against our country, against our values, against its youth and its way of life."

Hollande said that he would seek a United Nations resolution to "fight against terrorism."

"Meanwhile, France will intensify its military operations in Syria," Hollande said.

He added that he will ask Parliament to extend the country's state of emergency for three months.

The French president is still speaking. We have posted a live stream of Obama's press conference and Hollande's speech to his Parliament here.

Update at 10:10 a.m. ET. Search In Brussels Ends:

The operation we reported on earlier in Brussels has ended. The AP reports that police did not find the eighth suspect they were looking for.

Update at 10:12 a.m. ET. 'Face Of Evil':

During a press conference in Turkey, President Obama called the Islamic State, "the face of evil."

Obama also defended his strategy against the Islamic State. There is no use in invading Syria, he said, because for that to work, the U.S. would have to be willing to occupy it permanently.

"There will be intensification of the strategy that we put forward," Obama said. "The strategy that we are putting forward is the strategy that will ultimately work... but as I said in the beginning, it is going to take time."

Obama described the strategy against ISIS as one that goes after targets and leadership in Syria and one that strengthens Syrian and Iraqi forces that "are prepared to fight" ISIS.

We have posted a live stream of Obama's press conference and Hollande's speech to his Parliament here.

Update at 9:42 a.m. ET. A Supervisor For Would-Be Jihadists:

NPR's Dina Temple-Raston has more on who authorities believe served as the mastermind of this operation:

"According to two sources close to the investigation, Salim Benghalem, 35, is considered the supervisor for French would-be jihadists who travel to Syria to live and train with the group. He is the most high profile Frenchman with ISIS and considered the 'Jihadi John' of France. He grew up in Paris suburb of Cachan."

Update at 9:09 a.m. ET. The Specter Of Encryption:

NPR's Carrie Johnson sends us this missive:

In an address Monday morning in Washington at the Center for Strategic and International Studies, CIA Director John Brennan directly addressed the Paris attacks.

Among other things, CIA Director Brennan said the attacks seem "to have been carefully and deliberately planned" over a period of months.

Brennan said the attacks were "not a surprise."

"We did have strategic warning" but apparently no specific or operational details, Brennan added. He said the plot bears "the hallmarks" of ISIS and that there has been a "significant increase in operational security" by the Islamic State. Jihadis "have gone to school on what they need to do" to evade detection by Western intel services, once again raising the specter of encryption.

Update at 8:04 a.m. ET. A Moment Of Silence:

Earlier this morning, France observed a minute of silence to honor the victims of one of the country's deadliest terrorism attacks.

French President François Hollande and his cabinet observed the moment at Sorbonne University in Paris. It ended with the crowd gathered there singing La Marseillaise, the French national anthem.

Here is video of that moment via CNBC:

Update at 7:27 a.m. ET. An Operation In Belgium:

Reporting from Belgium, NPR's Peter Kenyon says that there is a big police operation happening in the Molenbeek neighborhood of Brussels.

It's unclear what is happening, but it appears that police may be closing in on the eighth suspect.

The public broadcaster in Belgium, RTBF, reported that one person has been arrested.

Update at 6:54 a.m. ET. What's Coming Up This Morning:

Two big things to look forward to this morning: French President François Hollande will speak to a joint session of Parliament at 10 a.m. ET. President Obama will have a press conference at 10:30 a.m. ET. He'll be speaking from Turkey, where he has been at a meeting of the G20. We'll, of course, blog that but we'll also make sure to post a live stream.

Update at 6:40 a.m. ET. Names Of The Dead Attackers:

So far, authorities have named five of the seven men who perpetrated attacks across Paris. They are:

-- Ismael Omar Mostefai, 29, who attacked music fans at the Bataclan and then blew himself up using a suicide vest.

-- Samy Amimour, 28, was another of the suicide bombers at the music venue.

-- Ahmad Al Mohammad, 25, died after detonating a suicide bomb outside the soccer stadium. His name was on a Syrian passport found alongside his body.

The Paris prosecutor Molins said in a statement that while the authenticity of the passport has been questioned, a man with Mohammad's fingerprints match those of a man who used the same passport to enter Greece in October.

Molins said that passport check in Greece is part of a requirement that all asylum seekers register at their first point of entry in the European Union.

-- Bilal Hadfi, 20, a French national and one of the other suicide bombers outside the stadium.

-- Brahim Abdeslam, 31, died when he denotated a suicide vest on Boulevard Voltaire. A French national living in Belgium, he is the brother of fugitive suspect Salah Abdeslam.

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