The Washington Post reports: A Chechen man who was fatally shot by an FBI agent last week during an interview about one of the Boston bombing suspects was unarmed, law enforcement officials said Wednesday.

An air of mystery has surrounded the FBI shooting of Ibragim Todashev, 27, since it occurred in Todashev’s apartment early on the morning of May 22. The FBI said in a news release that day that Todashev, a former Boston resident who knew bombing suspect Tamerlan Tsarnaev, was killed during an interview with several law enforcement officers.

The FBI has provided few other details, saying that the matter is being investigated by an FBI review team that may not finish its probe for several months.

“The FBI takes very seriously any shooting incidents involving our agents and as such we have an effective, time-tested process for addressing them internally,” FBI spokesman Paul Bresson said in a statement Wednesday. “The review process is thorough and objective and conducted as expeditiously as possible under the circumstances.”