Israeli aircraft bombed a target in Syria overnight Thursday, an Obama administration official said Friday night, as American officials said they were considering military options, including carrying out their own airstrikes.
American officials did not provide details on the target of the Israeli strike.
The Associated Press quoted Israeli officials on Saturday as saying the target of the raid was a shipment of advanced missiles bound for the Hezbollah Shiite militia in Lebanon.
While saying the shipment did not include chemical arms, the official described the missiles as "game changing," an apparent reference to the capability of the missiles.
In late January, Israel carried out airstrikes against SA-17 antiaircraft weapons, which the Israelis feared were about to be moved to Hezbollah.
Israel has been worried that chemical weapons and advanced arms might be transferred to Hezbollah from Syria, and the Israeli military has made clear that it is prepared to take action to stop such shipments.