Israel struck several positions south of Damascus in the first strikes since Syrian air defences were upgraded following the accidental downing of a Russian plane in September, a war monitor said Friday.
Damascus claimed its air defence systems shot down all "hostile targets" late Thursday. Israel did not confirm carrying out raids but denied any losses.
According to the Syria Observatory for Human Rights, the strikes hit two positions in the south of Damascus province, including an area believed to be an Iranian weapons depot near the capital.
"Israeli forces bombarded for an hour," Observatory chief Rami Abdel Rahman said.
Two missiles hit "weapons depots belonging to the Lebanese Hezbollah (militant group) as well as Iranian forces" in Kisweh.
Another missile hit the area of Harfa, where there is a Syrian military base, the Britain-based monitor said.
In Kisweh, "the depots that were targeted are used to temporarily store rockets until they are taken somewhere else," Abdel Rahman said.
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A military source quoted by the pro-government Al-Watan daily said "the aggression, despite its intensity, was not able to implement any of its goals and all enemy bodies were downed."
Initial reports by the Observatory suggested there were no casualties. The Israeli military denied any of its assets were hit but stopped short of denying it had conducted strikes at all.
"Reports regarding an IDF (Israeli military) aircraft or an airborne IDF target having been hit are false," it said in an English-language statement.
It said a Syrian surface-to-air missile was fired in the direction of an open area of the Israeli-occupied Golan Heights but it was unclear if it had hit Israeli-held territory.