Israeli Prime Minister Benjamin Netanyahu traveled to Moscow on Wednesday to meet with President Vladimir Putin and discuss military coordination in Syria.
The White House said, "The Iranian regime's deployment into Syria of offensive rocket and missile systems aimed at Israel is an unacceptable and highly unsafe development for the entire Middle East".
The strikes come after the Syrian army late Tuesday said it intercepted two Israeli missiles, while the Observatory said eight Iranians were among 15 foreign pro-regime fighters killed in that attack.
Iran on Friday supported Syria's right to defended itself against aggression from Israel, state TV reported, accusing others of remaining silent over the attacks on Tehran's key regional ally.
"Anyone who would cause us harm, we inflict even greater harm in response, but for those who are preparing to harm us, we will act in order to inflict damage ahead", - said the head of government.
Israel today launched its largest barrage of rockets to strike Syria in recent years, claiming to target all of Iran's military infrastructure in the country.
Germany and Britain joined america in denouncing the rocket hearth in direction of the Israel-occupied Golan Heights in addition they stated was carried out by Iran, whereas France reiterated its "unwavering assist for Israel's safety".
The Israeli newspaper Haaretz quoted an unidentified security official as saying Israel's attacks inside Syria were the most extensive since the two nations signed a disengagement agreement after the October war of 1973.
Notwithstanding the sympathetic words from various capitals, Israel stands alone in facing off an increasingly hostile Iran.
On the other hand, Israel has been constantly stressing that it will take all necessary steps to prevent Iran from setting up "forward bases" in Syria to be used to attack the Jewish state.
"Iran s deterrence against Israel is done in Lebanon with more than 100,000 missiles, not in Syria", he said, hinting at Lebanese movement Hezbollah s stockpile of rockets.
The immediate tensions stem from an Israeli air strike on what they claimed was an Iranian drone facility at the so-called T-4 air base, near Palmyra, on 9 April, which reportedly killed several Iranian military advisers.
Iran, then, will probably attack directly.
But Syria was offered an opportunity to reclaim the Heights shortly after the Six Day War - only to reject a deal because it meant accepting Israel's right to exist. "We are getting closer to the brink", said Heiko Wimmen, of the International Crisis Group. It was the first time Israel has directly accused Iran of firing toward Israeli territory. President Donald Trump's withdrawal from the global nuclear agreement with Iran, with strong support from Israel, has further raised tensions.
Lieberman said that in response to Iran's "arrogance", Israel destroyed nearly all of Iran's infrastructure in Syria. But Israel and Russian Federation have maintained close communications to prevent their air forces from coming into conflict. Israel responded by attacking anti-aircraft positions in Syria, and an Israeli warplane was shot down during the battle. Additional US priorities in Syria are advancing the "political process" (i.e. worldwide efforts to broker a permanent peace agreement) and deterring Assad from the use of chemical weapons, he said.