A friend of Tamerlan Tsarnaev implicated himself and the Boston bombing suspect in an unsolved triple homicide before FBI agents killed him in a violent altercation Wednesday, local media reported. The Federal Bureau of Investigation said the man initiated a "violent confrontation" during questioning in Orlando, Florida and was killed, and that an FBI agent suffered "non-life threatening injuries."

The US administration hit back Tuesday after being accused of undermining press freedom by seizing reporters' phone records, insisting officials are probing a dangerous leak of state secrets. Attorney General Eric Holder told a news conference that investigators had secretly obtained telephone logs from a US news agency while seeking the source of a security breach which had put "the American people at risk." "I've been a prosecutor since 1976. And I have to say that this is among, if not the most serious ... a ... very, very serious leak," Holder said.

WASHINGTON (Reuters) - The FBI on Thursday released the photographs of three men it said were at the U.S. diplomatic mission in Benghazi, Libya, when it was attacked last September. The FBI did not call the three men suspects in the attacks, saying only that they "may be able to provide information to help in the investigation." "The FBI is now asking Libyans and people around the world for additional information related to the attacks," the U.S. investigative agency said in a statement with the photographs.

By Scott Malone and Svea Herbst-Bayliss BOSTON (Reuters) - The surviving suspect in last week's Boston Marathon bombing was moved to a prison medical centre outside Boston on Friday, while the body of his older brother who died in a shootout with police remained unclaimed, officials said.