"We will not allow Iranian entrenchment in Syria no matter the price to pay," he told journalists. "We have no other option. Allowing Iran to strengthen itself in Syria is like accepting that the Iranians strangle us."

Lieberman did not confirm Israel carried out Monday's deadly strikes, which Syria and Russia blamed on Israel.

Israel has sought to avoid direct involvement in Syria's civil war, but it acknowledges carrying out dozens of air strikes there to stop what it says are advanced arms deliveries to its enemy Hezbollah, the Lebanese Shiite group that is backing President Bashar al-Assad's regime.

It has also repeatedly warned it will not accept its arch-foe Iran entrenching itself militarily in neighbouring Syria.

On Monday, Israel accused Syria of "crimes against humanity" over an alleged chemical attack on a rebel-held town, saying Assad's regime was responsible.