First Potomac Realty Trust reports year-end earnings rally

First Potomac Realty Trust posted a 12 percent jump in earnings for the final three months of 2012 due in part to higher operating income, but year-over-year earnings were dragged down by an internal investigation into the company’s financial reporting.

The Bethesda-based real estate investment trust reported fourth-quarter funds from operations of $16.6 million, or 32 cents per share, up from $14.8 million, or 28 cents per share, for the last three months of 2011.

For the full year, funds from…