Israel has struck Iranian military sites in Syria to prevent what it said was a pending drone strike by Iran. Israel's military rarely acknowledges operations in Syria, but it claimed on Saturday its strikes had prevented an attack on Israel "using killer drones". PM Benjamin Netanyahu hailed his military's "major operational effort". Israel is believed to have carried out hundreds of strikes in Syria since civil war broke out there in 2011, to try to prevent Iran gaining a foothold. An Israeli military spokesman said the strikes on Saturday targeted the Quds Force of the Iran's Islamic Revolution Guard Corps (IRGC) in Aqraba, south-east of the capital, Damascus. A Syrian military source quoted by the official Sana news agency said that Syrian anti-aircraft defences "detected enemy targets from Golan heading towards the area around Damascus". "The aggression was immediately confronted and so far the majority of the enemy Israeli missiles have been destroyed before reaching their targets," the source said. In a tweet, Mr Netanyahu said: "I reiterate: Iran has no immunity anywhere. Our forces operate in every sector against the Iranian aggression. 'If someone rises up to kill you, kill him first.'" The head of the Iranian-backed Lebanese militant group Hezbollah, Hassan Nasrallah, said two Lebanese nationals had been killed in the Israeli strike, which he said targeted Hezbollah positions.