Israel said more than 20 rockets were launched by Iranian forces in Syria towards Israeli-claimed territory late Wednesday, often criss-crossing across the clear night skies. A number of those rockets were intercepted by Israel's Iron Dome aerial defense system, resulting in bright and sudden explosions.
Iran's leaders have not yet issued a response to the Israeli accusations or the military strikes, but if confirmed it would be the first time Iranian forces have fired rockets directly at Israeli forces.
Israel retaliated with what appeared to be surface-to-surface missiles, and Syrian anti-aircraft batteries hosed the sky with fire in an effort to intercept them. Thunderclaps of Israeli artillery fire reverberated across the frontier between Syria and Israel, with the faint sound of impact echoing back moments later.
All night, drones buzzed overhead, heard but not seen in the darkness.
Three people were killed and two others were injured by the Israeli missiles, the Syrian military said in a statement. The attack also destroyed a radar station, ammunition depot and caused material damage to Syria's air defense, it said.
The Syrian military also claimed that its air defense managed to intercept and destroy a "big part of the wave of Israeli missiles that targeted a number of our military positions."
Golan Heights explained
The Golan Heights is considered Israeli-occupied territory, taken from Syria in the 1967 Six-Day War. Israel officially annexed the Golan Heights in 1981 in a move never recognized by the international community.
United Nations Security Council Resolutions have demanded the return of the Golan Heights to Syria, but Israeli leaders have made it clear they have no intention of conceding the strategic position to Syria.
In a statement delivered shortly after midnight Thursday, a spokesman for the Israel Defense Forces pinned the blame for the rocket fire on the Quds Force, an elite division of Iran's Revolutionary Guard Corps, which has forces in Syria and is often seen as the face of Iran's regional ambitions.
Lt. Col. Jonathan Conricus said the rockets, which were targeted at front-line Israeli military positions in the Golan Heights, were all either downed by aerial defense systems or fell short and landed in Syria.
Conricus said Israel responded by successfully hitting dozens of Iranian targets in Syria in what he described as "the largest operation against Iranian targets" in years.
"Israel has hit almost all of Iran's infrastructure in Syria," Defense Minister Avigdor Liberman said Thursday morning. "If it will rain in Israel, there will be a biblical flood on the other side."
He reiterated Israel's stance that this latest offensive was not an ongoing operation, adding: "I hope this chapter is over, and everyone understands the situation, and we won't have to spend nights in situation rooms."
On Wednesday night, state-run Sana TV, in southern Syria, carried reports that Israel had fired several missiles at the city of Baath in Quneitra, none of which resulted in casualties.
A short time later, Syrian state-run media reported that while dozens of "hostile" Israeli missiles had been intercepted in Syrian airspace, at least two others had hit an ammunition depot and destroyed a radar site.
The targets included rocket launchers, intelligence posts, military command posts, and weapons depots. No Israeli fighter jets were hit in the strikes, but Conricus said they came under heavy anti-aircraft fire. He added that "ground assets were also used to strike into Syria." The IDF released a map showing a list of targets it said it hit.
The IDF has struck dozens of Iranian military targets in Syria in response to the Iranian rocket attack against Israel. Quds force is behind attack and has played the initial price. IDF remains ready for various scenarios but does not seek to escalate the situation. pic.twitter.com/4rC8gHK2LG
Russia, which like Iran has intervened in Syria's war on the side of the government, called for "restraint on all sides" Thursday.
"The current aggravation between Israel and Iran, their exchange of strikes, is dangerous, as it distracts from the fight against ISIS, against terrorists, hampers the political settlement of the situation in Syria," said Russian deputy foreign minister Mikhail Bogdanov, the state-run RIA Novosti news agency reported.
The White House said in a statement that "The United States condemns the Iranian regime's provocative rocket attacks from Syria against Israeli citizens, and we strongly support Israel's right to act in self-defense."
"Iran's Islamic Revolutionary Guard Corps (IRGC) bears full responsibility for the consequences of its reckless actions," the statement added.
Israel had been expecting an Iranian response for some time, following a series of military strikes in Syria that targeted Iranian positions. Syria and Iran blamed those strikes on Israel, and Iran's leaders vowed revenge.
The most recent strike occurred Tuesday night, only hours after President Donald Trump had withdrawn the United States from the Iran nuclear deal, sparking fears of further destabilization in the Middle East.
A US defense official told CNN that it was an Israeli military strike that hit suspected Iranian weapons near Damascus. Israel has not commented on the strike.
On Tuesday, the IDF went on high alert in anticipation of an Iranian response, in addition to calling up a limited number of reserve troops "on an as needed basis." Israel opened bomb shelters in the Golan Heights, but did not instruct people to enter the shelters.
On Wednesday morning, the IDF chief of staff, Lt. Gen. Gadi Eisenkot, visited the Golan Heights to meet with military and civilian leaders on the IDF's assessment of the situation.
In a bilateral meeting after the celebrations, Netanyahu said that Israel has the "obligation and right to defend itself against Iranian aggression, from Syrian territory. They are trying to transfer forces and deadly weapons there with the explicit goal of attacking the State of Israel. Certainly, it is Israel's right to take such steps as necessary to defend itself against this aggression."
Putin, as one of the few leaders who has good relations and significant influence with both Israel and Iran, urged restraint.
"The situation, unfortunately, is very acute. I want to hope that we will be able not only to discuss with you, but also to look for solutions that would soften the situation," said Putin.
Russia and Israel coordinate their actions within Syria for the purpose of deconfliction. According to Conricus, Israel notified Russia before carrying out the overnight strikes.
In an interview with the Greek newspaper Kathimerini published Thursday, Assad said fears of a third world war erupting in Syria were misplaced, despite escalating tensions.
Assad told the paper that "wise Russian leadership" would prevent such an event, describing the current conflict as "something more than a cold war, less than a full-blown war." He also took aim at the US, saying the Russians "know that the agenda of the deep state in the United States is to create a conflict."
As dawn broke Thursday morning, the sounds of conflict had dissipated, though it remained unclear whether Israel and Iran would continue fighting, or if the tit-for-tat had ended.
Israel insisted it did not want to escalate the situation and encouraged its citizens to continue their daily routine.
CNN's Oren Liebermann reported from Golan Heights. Salma Abdelaziz reported from Jerusalem. James Masters wrote from London. Sarah El Sirgany in Dubai contributed to this report.