A top aide to U.S. Rep. Michele Bachmann has been charged after a rash of thefts in a House office building where her office is located, Capitol Police said Monday.

Javier Sanchez, Bachmann's legislative director, was identified as a suspect afer a months-long investigation of thefts inside the Rayburn House Office Building, across the street from the U.S. Capitol. He was arrested on Thursday.

A spokesman for Bachmann said that as of Friday Sanchez is "no longer with the office." Further questions were referred to the police.

Sanchez, 37, of Virginia, was charged with "Theft 2" under the Washington, D.C., criminal code, said Capitol Police Officer Shennell Antrobus. The officer did not provide details of the thefts, other than to say they have been under investigation since earlier this year.

It was unclear Monday night if Sanchez was implicated in one or more thefts. Antrobus indicated that police had been investigating an ongoing problem of thefts in Rayburn before Sanchez was arrested. The Hill newspaper cited an unnamed police official saying the arrest was in connection with the theft of cash from Bachmann's office, and was unrelated to other thefts in Rayburn.

NBC News in Washington, citing an affidavit, reported that Sanchez was identified in a hidden camera sting investigation taking two envelopes of cash from co-workers.

According to the city code, Theft 2 is a second-degree misdemeanor punishable by a maximum fine of $1,000 and imprisonment for no more than 180 days. It covers thefts valued at under $1,000. Sanchez did not respond Monday to an email seeking comment. According to congressional records, Sanchez came to Bachmann's office in January after working the past two years as a legislative assistant to Rep. Virginia Foxx, R-N.C. The incident comes six weeks after Bachmann, who faces a number of legal probes from her 2012 presidential campaign, announced she would not seek a fifth term in Congress.