BREAKING: Explosions at U.S. embassy in Athens an act of terrorism?

BREAKING: A rocket caused the blast and Athens police are saying it was an act of terrorism!

UPDATE: Via The Associated Press:

"This is an act of terrorism. We don't know where from," Attica Police Chief Asimakis Golfis said. "There was a shell that exploded in the toilets of the building ... It was fired from street level."

UPDATE #2: The U.S. ambassador to Athens, Charles Ries spoke to reporters outside the mission:

"I am treating this as a very serious attack. "The embassy was attacked in a senseless act of violence. There were no injuries."

UPDATE #3: A pair of anonymous phone calls came in claiming responsibility for the bombing by a local leftist guerrilla group:

"There is one or two anonymous phone calls which claim that the Revolutionary Struggle was behind the attack," Public Order Minister Byron Polydoras told reporters outside the embassy.

DEVELOPING...

[Note: This 'live thread' is a continuation of the former!]