Israeli Prime Minister Benjamin Netanyahu held out the prospect on Sunday of further Israeli strikes inside Syria, pledging action to prevent advanced weapons from reaching Hezbollah and other militant groups.

Although Israel has not publicly taken sides in the civil war between Syrian President Bashar al-Assad and rebels trying to topple him, Western and Israeli sources say it has launched airstrikes in Syria to destroy weapons it believed were destined for Lebanon's Hezbollah.

Netanyahu made no direct mention of those attacks in public remarks at the weekly meeting of his Cabinet, but made clear that Israel was prepared to take action in the future and said it was "preparing for every scenario" in the Syrian conflict.

Israel had set a policy "to prevent, as much as possible, the leakage of advanced weapons to Hezbollah and terror elements", he said.

"We will act to ensure the security interest of Israel's citizens in the future as well," Netanyahu added, describing his government's actions as "responsible, determined and level-headed". Israel has neither confirmed nor denied reports it attacked Iranian-supplied missiles stored near Damascus this month that it believed were awaiting delivery to Hezbollah.