WASHINGTON (AP) — The name of the dead Boston Marathon bombing suspect was included in a federal government travel-screening database in 2011 after the FBI investigated the man at Russia’s request, two law enforcement officials briefed on the investigation told The Associated Press on Monday.

Tamerlan Tsarnaev’s name was entered into the Treasury Enforcement Communications System, or TECS, as a routine procedure when the FBI looked into whether Tsarnaev was involved in terrorist activity, the law enforcement officials said, speaking on condition of anonymity because the investigation was ongoing. TECS is the system used by U.S. officials at the nation’s borders to help screen people arriving in the U.S.