Lt. Col. Jonathan Conricus, a army spokesman, referred to as the roughly 20 missiles fired from Iranian forces based mostly in Syria "essentially the most extreme try" by Iran's Al Quds power to assault the nation.
Mr Conricus said Israel forewarned Russian Federation of its strikes on Thursday, which Syrian state media first reported hit Baath City in Quneitra, near the border.
But a military source told the official Sana news agency that some missiles had hit a number of air defence battalions, radars and an ammunition depot.
An Israeli military statement said "this Iranian aggression is another proof of the intentions behind the establishment of the Iranian regime in Syria and the threat it poses to Israel and regional stability".
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The violence comes two days after President Donald Trump, encouraged by Israel, said the US would quit Iran's nuclear agreement and reinstate sanctions against the Islamic Republic. Israel regards Iran as its biggest threat, and has repeatedly targeted Iranian forces and allied militia in Syria. The Israel Air Force responded by bombing dozens of Iranian targets in Syria, the largest such operation in decades. "The Syrian regime can be held accountable for every little thing taking place in its territory", the press launch learn.
Tensions have been escalating between Israel and Iran in recent months.
"Given what is happening in Syria at this very moment, there is a need to ensure the continuation of military coordination between the Russian military and the Israel Defence Forces", Netanyahu told reporters before departing, referring to a hotline created to prevent the countries clashing accidentally.
Tensions have been high since US President Donald Trump announced he was quitting the Iranian nuclear deal on Tuesday, prompting Israel to go on high alert.
Mr Netanyahu was in Moscow this week, informing Russian President Vladimir Putin, whose country is an ally of Iran and Syria, about the findings.
Liberman used the conference stage to expand on many issues including Israel's policy towards Syria: "We will not allow Iran to bring anti-aircraft warfare (to Syria) and close Israeli air space".
With the war winding down and the group able to refocus on its longtime foe, Israel, the border between the two countries may again heat up. It also deployed new defences and mobilised some reservist forces.
Israel later said the drone had been armed.