Assad loyalist try to break into French, US embassy compound in Damascus, confrontation erupts with embassy guards said diplomats.

Attackers leave US embassy complex in central Damascus, syrian authorities' response "slow and insufficiant".

The U.S. State Department plans to call in Syria's senior diplomat in Washington to complain about an attack on the U.S. embassy in Damascus, a U.S. official said on Monday.

"We are calling in the Syrian charge (d'affaires) to complain," said the official who spoke on condition of anonymity, saying no U.S. personnel were injured in the attack. "We feel they failed (in their responsibility to protect U.S. diplomats). We are going to condemn their slow response."

Reuters