A tempering sign from Russian Federation came in a report that it is backing away from plans to sell modern missile systems to Iran.
Among the victims of air strikes of Israel supposedly 11 Iranians.
Iran's Foreign Ministry spokesman accused Israel of attacking Syria under "fabricated and baseless excuses", breaching Syria's sovereignty.
The message on Twitter Thursday, a day after Israel once again struck targets in Syria believed to house Iranian materiel and personnel, was unusual for an Arab leader in its blunt defense of Israel.
He said that it was a mistake to think that Thursday morning's attacks on the Iranian bases had completely solved the problem, but that the army was ready for anything and would continue to do whatever necessary to ensure Israel is secure.
"The Iranians tried to attack Israel's sovereign territory", Israeli Defense Minister Avigdor Lieberman charged. Meanwhile, Iran's government has faced growing domestic criticism for pursuing expensive military adventures overseas while the economy stagnates; this latest setback is likely to fuel those grievances. To prove this, Lyamin cites as an example loss of an Israeli F-16 fighter jet in one of previous Israeli strikes this February.More news: Georgia officer suspended for traffic stop with 65-year-old grandmother
As it had said it would, Iran finally retaliated on Wednesday. As a result of air strikes of Israel on Iranian facilities in Syria killed at least 27 people.
Israeli combat aircraft hit Iranian military installations overnight, in response to a barrage of rockets on the Israeli-held Golan Heights.
The exchange was the first outbreak of military violence since President Donald Trump pulled out of the Iran nuclear deal, a move that was strongly encouraged and supported by Israeli Prime Minister Benjamin Netanyahu.
Since the Syrian civil war began in 2011, Israel has carried out more than 100 air strikes on Syrian soil, mainly to prevent Iran from sending advanced weaponry via Syria's air bases to Hezbollah. Iran's force of Shia militiamen from Iraq and Central Asia has been useful for controlling Syrian territory but would be little more than cannon fodder against Israel.
"We will expand our missile capabilities despite Western pressure [to curb it]... to let Israel know that if it acts foolishly, Tel Aviv and Haifa will be totally destroyed", Reuters translated Ahmad Khatami as saying during Friday prayers at Tehran University, broadcast on Iranian state television.