Turkish leftist group DHKP-C said it was responsible for a suicide bomb attack on the US embassy in Ankara on Friday, according to a statement on a website close to the group.
"Our warrior Alisan Sanli carried out an act of self-sacrifice on Feb 1, 2013, by entering the Ankara embassy of the United States, murderer of the people of the world," the statement said.
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Armed police have carried out a raid apparently linked to Wednesday's deadly terror attack in Westminster.
Cheryl Grimmer vanished from inside a beach shower block in Wollongong, Australia, in 1970, when she was just three.
Pc Keith Palmer was on the front line and because of his actions, the Westminster attacker was unable to kill anyone else.