Turkey's extreme-left Revolutionary People's Liberation Party-Front (DHKP-C) has waged a violent campaign for more than three decades.

BBC: Profile: Turkey's Marxist DHKP-C

It said the 40-year-old Turkish man was a member of the outlawed Revolutionary People's Liberation Party-Front, or DHKP-C, which has claimed responsibility for assassinations and bombings since the 1970s.

NPR: Suicide Bomber Kills Guard At US Embassy In Turkey

Turkey's interior minister, Muammer Guler, said law enforcement authorities had information the bomber was a member was a Turkish man in his 30s who had been previously jailed on terrorism charges and was a known member of the outlawed leftist group, the Revolutionary People's Liberation Party-Front, or DHKP-C.

WSJ: Security in Ankara Is Adequate, U.S. Says; Leftist Group Suspected in Blast