Israel carried out an airstrike on Syria's Damascus International airport and other positions south of the capital, killing five soldiers, two of which were members of Iran-backed militias, and causing material damage, the Syrian ministry of defense said early on Saturday.
Syrian air defenses intercepted the attack and managed to down most of the missiles, a ministry statement said.
There was no immediate confirmation if the strike has affected airport operations.
In a speech given by Hezbollah Secretary General Hassan Nasrallah hours after the attack, he sent a strengthening message to Syria, stating that "unification of the resistance forces in the region is required, because this is the only way in which the Lebanese, Palestinians and Syrians will get their lands and the gas and oil again."
Nasrallah emphasized that "if we come to a confrontation, we are ready for it", adding that he thinks "the Israelis, the Americans and others have enough data about the seriousness of the resistance and they know that we are not joking about this issue".
Israel's previous airstrikes on Syria
Israel has intensified strikes on Syrian airports to disrupt Tehran's increasing use of aerial supply lines to deliver arms to allies in Syria and Lebanon including Hezbollah, regional diplomatic and intelligence sources told Reuters.
Tehran has adopted air transport as a more reliable means of ferrying military equipment to its forces and allied fighters in Syria, following disruptions to ground transfers.
Hundreds of thousands of people have died and millions made homeless since protests against Syrian President Bashar al-Assad in 2011 developed into a civil war that drew in foreign powers and left Syria carved into zones of control.