The two have never fought a war, but fears that may change in the near future are increasing.
It quoted Syrian military sources as saying that "the rockets fired from Syria has hit sensitive and important Israeli military targets inside Israel, adding that the Iron Dome system failed to intercept dozens of rockets that targeted four Israeli military compounds". And, Israeli officials said Syria's government will be held responsible for "everything happening in its territory".
He said the United Nations chief, though relieved at "partial normalization of the situation", has reiterated support to long-term de-escalation efforts and stability in the Middle East and has stressed a political solution to the conflicts.
Israel had been bracing for a possible Iranian "revenge" attack after the Islamic Republic accused the Jewish state of having attacked one of its bases in Syria on April 9 in which nine Iranian commanders were said to have been killed.
The tense shadow war between Iran and Israel burst into the open early Thursday as Israeli warplanes struck dozens of Iranian military targets inside Syria. It was not immediately clear if any Iranians were among the dead. The Syrian state news agency reported that the country's air defenses responded to at least two waves of Israeli missile attacks after the strike against the Israeli positions.
But the chairman of Iran's parliamentary committee on foreign affairs condemned Israel for carrying out the strikes in Syria.
Israel has carried out over 100 airstrikes in neighboring Syria since the civil war erupted in 2011, most believed to be aimed at suspected Iranian weapons shipments bound for the Hezbollah militant group.
"A surface-to-surface missile landed at dawn in the vicinity of the town of al-Hibbariyeh, during the exchange of fire between the Syrian forces and the Israeli enemy", NNA said.
Well, Israel struck back at Iranian targets in southern and central Syria.
Appearing at an annual security gathering north of Tel Aviv on Thursday, Lieberman vowed to fiercely defend Israel against any further Iranian actions. Whatever their next move, Israel's Defense Minister Avigdor Lieberman has promised another heavy response, saying the Iranians "have to remember, if for us it's raining, it will be a flood for them".
"We are not interested in the atomic bomb, but we are increasing our missile capabilities in other fields so that Israel can not sleep well", he was quoted as saying by semi-official ISNA News Agency.
But he insisted Israel had "no interest in escalation" of the situation, adding: "I hope that we have finished this chapter and that everyone got the message".
"Whoever hurts us, we will hurt them seven-fold, and whoever is preparing to hurt us, we will act to hit them first", he said.
Israeli Merkava Mark IV tanks are deployed along the border with Syria, in Golan Heights, Israel. Israel started warning of prospective Iranian retaliation around this point.
The Agreement on Disengagement was an agreement between Israel and Syria, signed in May 1974, which officially ended the Yom Kippur War and the subsequent attrition period on the Syrian front.
He noted that in contacts with the leadership of both countries, including a meeting on Wednesday between Mr Netanyahu and Russian President Vladimir Putin in Moscow, "we underlined the necessity of avoiding any actions that might be mutually provocative".