Syrian state media outlets have said government air defenses responded to an "aggression" aimed at one of its airbases. They did not say who was responsible for the strike.
Syrian government air defenses have shot down missiles targeting Shayrat Airbase in the western province of Homs, state media reported on Tuesday.
The apparent attack came days after the US, France and Britain conducted a coordinated missile attack against Syrian government targets.
Read more: Airstrikes in Syria: What you need to know
What we know so far:
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Site of previous US attack: The Shayrat airbase was the target of an April 2017 US missile attack in response to an earlier chemical weapons attack by the Syrian government.
Saturday's strike: The US, France and the UK launched airstrikes against Syrian government targets on Saturday in response to an alleged chemical weapons attack by the government on civilians in Douma city near Damascus.
Israeli interventions: Tel Aviv has carried out multiple airstrikes on Syrian government targets during the conflict. Syria and its allies most recently accused Israel of launching a strike against Syria's T4 airbase in Homs, killing four Iranian military personnel. Iran is a longstanding ally of Syrian President Bashar Assad.
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amp/aw (AP, AFP, Reuters, dpa)