Syrian air defences shot down 13 missiles fired in a U.S.-led attack on the country on Saturday, Syrian state TV said.
It said the missiles had been shot down in the Kiswah area south of Damascus, the capital.
The Syrian Observatory for Human Rights said a total of three scientific research centres had been hit in the attacks - two in Damascus and one in the Homs area - in addition to military bases in Damascus.
The Observatory said all the bases and facilities struck in the attack had been evacuated by the Syrian government earlier this week.