An Orlando man being investigated over ties to Boston bombing suspect Tamerlan Tsarnaev was shot and killed during an encounter with an FBI agent late Tuesday, WESH Orlando reports.

WESH has more:

A friend of the suspect, Khusn Taramiv, said his friend, 27-year-old Ibragim Todashev, was being investigated as part of the Boston bombings and knew bombing suspect Tamerlan Tsarnaev because both were MMA fighters.

Taramiv claims he and Todashev were interviewed by the FBI for nearly three hours on Tuesday.

“(The FBI) took me and my friend, the suspect that got killed. They were talking to us, both of us, right? And they said they need him for a little more, for a couple more hours, and I left, and they told me they’re going to bring him back. They never brought him back,” Taramiv said.

The FBI said Todashev was not suspected in the Boston Marathon bombing, but was being questioned since he had recent contact with one of the bombers. Speaking to NBC News, officials said Todashev was cooperative at first, and later confessed to being involved in a brutal Boston-area slaying two years ago.

As he was about to sign a written statement based on this confession, officials said Todashev attacked an agent with a knife, and the agent shot and killed him, NBC News reports.

FBI sources speaking to WESH said that Todashev, who is from Chechnya, "flipped out" during an interview.

Read more:http://www.businessinsider.com/fbi-orlando-man-questioned-boston-bombing-shot-killed-by-fbi-2013-5#ixzz2U3FDZzIj

(CBS News) The FBI was involved in what it called a "violent confrontation" in Orlando, Fla., early Wednesday that killed a Chechen man with ties to the older brother suspected in last month's deadly terrorist bombing at the Boston Marathon.

...

In a statement Wednesday, the FBI didn't refer to Todashev by name but said that the individual who died was being interviewed in connection with the investigation into the April 15 attack. An FBI special agent was accompanied by two Massachusetts State Police troopers and other law-enforcement officers to interview Todashev in the apartment complex where he lived.

"In the encounter in the apartment, something went wrong," Miller said.

The FBI said that the interview subject initiated "a violent confrontation." The FBI said the agent "sustained non-life-threatening injuries" during the confrontation and was involved in the shooting but didn't provide any other details.

An official told CBS News that Todashev came at the agent with a knife.

http://www.cbsnews.com/8301-505263_162-57585638/boston-bombing-suspects-friend-ibragim-todashev-killed-in-fbi-shootout/

When you can't find the responsible.