The Observatory said a number of Iranian headquarters buildings were also destroyed in the attack.
In addition, Syrian state media SANA reported that three civilians were killed and four more injured by shrapnel, including a child, in communities outside Damascus during the exchange.
SANA did not specify if the shrapnel came from the incoming missiles or from the Syrian military’s own air defenses.
The state news outlet reported that the fragments struck homes in the communities of al-Hujaira and al-Adliya outside Damascus.
Photographs shared on social media showed the damage caused to buildings in those areas.
Both Syria and the Observatory said Israel was behind the airstrikes, though Jerusalem has been mum on the matter. However, the attack came a day after Defense Minister Naftali Bennett hinted that the Israel Defense Forces was poised to take action in Syria.
“Keep your ears open. We’ve gone from a policy of blocking [Iran] to pushing it out,” Bennett told the 103FM radio station on Sunday.
The strike outside Damascus on Monday was the third attack on Iranian targets in Syria attributed to Israel in the past 10 days.
Last week Syria accused Israel of hitting targets near Homs. The Syrian Observatory for Human Rights said the targets were “military posts for Iranian militias in the Palmyra desert.”
On April 15, a car driven by several Hezbollah operatives was also targeted in a strike attributed to Israel as it made its way from Syria toward Lebanon. The passengers in the vehicle escaped after an apparent warning shot was first fired next to the car.
Jerusalem says Iran’s presence in Syria, where it is fighting in support of President Bashar Assad, is a threat, as Tehran seeks to establish a permanent foothold along Israel’s northern borders. Israel has also threatened to take military action to prevent Iran from providing the Lebanon-based Hezbollah terror group with advanced weaponry, specifically precision-guided missiles.