A high-ranking Syrian military official said that “dozens of elite troops” were killed in the Israeli airstrikes on targets near Damascus, some of which were close to the presidential palace.

The unnamed official told the New York Times, in an interview published on Monday, that the facilities were in some of the “country’s most tightly secured and strategic areas.”

Local resident and rebel activists backed up the report and said that the airstrikes, allegedly targeting Iranian missile shipments en route to Hezbollah, hit bases of the elite Republican Guard stationed in the capital.

Speaking to reporters about the attack French Foreign Minister Laurent Fabius said that “We can understand (Israel) but it is a risk”, AFP reported. Laurent, who was on a visit to Hong Kong, added that “if the conflict spreads to neighboring countries, it is a turning point in the nature of this conflict.”

Prime Minister Benjamin Netanyahu landed in China on Monday morning and said only that “he was prevented from addressing the Syria attacks”.

Netanyahu’s decision to go ahead with his China trip — he had canceled twice previously, irritating Beijing, and indicated Sunday he never considered canceling this time — was designed in part to underline Israel’s desire to maintain relative calm, and avoid a further escalation of hostilities, analysts said. Channel 2 Arab affairs analyst Ehud Yaari said there were “no specific Syrian threats of retaliation.”

Syria’s Deputy Foreign Minister Faisal Mekdad warned Sunday that the Friday and Sunday airstrikes constituted an Israeli “declaration of war.” The Syrian Cabinet said in a statement that Israel’s alleged strikes into its territory “opened the door to all possibilities,” and that it reserved its right “to protect the homeland, the state and the people against any internal or external aggression by all means.”

Syrian state television cited anonymous sources warning that Syrian missile batteries were prepared to attack Israeli targets in case of future attacks. Earlier on Sunday, a pro-Hezbollah TV station in Lebanon claimed that Syria had deployed missiles directed at Israel, and that a decision had been taken in principle to respond to the airstrikes. Still, Israeli officials said there was only a “low likelihood” of immediate Syrian retaliation.

Israel on Sunday deployed two Iron Dome anti-missile batteries, in Safed and Haifa, and Haifa Mayor Yonah Yahav ordered preparations in his city for the possibility of Syrian retaliation. Israel also closed off its airspace in the north for the first time since the 2006 Lebanon War, halting civilian flights to and from Haifa’s airport through Thursday.

The Iron Dome system has proved highly effective in stopping short-range rocket fire, intercepting 84 percent of the incoming rockets from Gaza it aimed at during Operation Pillar of Defense last November, according to official IDF statistics.

Speaking after an emergency meeting of the Israeli cabinet, Tourism Minister Uzi Landau (Yisrael Beytenu) said that it was “essential” that Israel maintain its policy of preventing “certain weaponry from reaching terrorist groups,” but did not formally confirm Israeli responsibility for the strikes. He urged Israelis to “go about their business as usual.”

Such advice notwithstanding, Channel 10 reported a quadrupling of Israeli requests for gas mask protection kits Sunday.

Syrian Deputy Foreign Minister Faisal Mekdad. (screen capture: Youtube/Channel4News)

Syrian Deputy Foreign Minister Faisal Mekdad. (screen capture: Youtube/Channel4News)

Mekdad made his “declaration of war” statement during an interview with CNN on Sunday morning, hours after Israel reportedly struck military targets on the outskirts of Damascus for the second time in 48 hours. He said Syria had “dealt with” similar conflicts with Israel “on several occasions.” Syria’s “retaliation was always painful,” he said, “and they will suffer again.”

Mekdad also asserted that the attacks reflected an alliance between Islamic terrorists fighting against Assad’s regime and Israel, and warned that Syria would retaliate as and when it saw fit.

Syrian officials made similar threats after an alleged Israeli airstrike on a weapons convey near the Lebanese-Syrian border at the end of January 2013.

The Foreign Ministry in Damascus stated that the strikes “killed and wounded several people.” In a letter sent to the United Nations and the UN Security Council, the ministry also said that the “Israeli aggression… caused widespread destruction.”

Syria’s Information Minister Omran al-Zoubi said soon afterward that “all options are open” for Syria to respond to the attacks, which he claimed conclusively demonstrated the alliance between “the terrorists, infidels and Zionists” fighting the Assad regime. Syria would “not allow itself to be humiliated,” al-Zoubi said, “and to see its security compromised.”

However, al-Zoubi also said the regime’s priority was to battle the forces inside Syria that were challenging the regime, and he denied claims in some Arab media that an Israeli plane had been shot down by Syrian forces and two pilots captured.

Egypt and the Arab League condemned the strike, with Cairo’s Foreign Ministry saying it was against any infraction of the sovereignty of Arab countries.

A Syrian state TV report claimed Israeli rockets hit a military research site on the outskirts of the capital at about 2 a.m.

Netanyahu convened the security cabinet on Sunday afternoon to discuss the escalating hostilities with Syria. He delayed his Sunday evening departure for China by two hours in order to participate in the meeting.

It was unclear how the blasts in Syria would affect Netanyahu’s agenda in China. Dr. Yoram Evron, a senior research fellow at the Institute for National Security Studies and a faculty member of the University of Haifa’s Asian Studies Department, said Netanyahu would cite Israeli assessments of weapon transfers in the region in his discussions with the Chinese government to warn them of Iran acquiring a nuclear weapon.

“Stability in the Middle East is not only an Israeli interest, it’s also something the Chinese are worried about,” Evron said. “Israel has long argued that a nuclear Iran would be a danger not only for its own security but would destabilize the entire Middle East and lead to a region-wide arms race.”

Evron said Netanyahu would likely point out in Beijing that Tehran is already transferring weapons to Hezbollah, via Syria, and the possession of nuclear weapons would embolden the ayatollahs’ regime even more to act to destabilize the region. As North Korea’s actions in recent weeks have shown, Netanyahu might argue, rogue regimes closing in on the bomb are hard to control, and that is in nobody’s interest, Evron added.

Still, while the Chinese government does not want to look indifferent to what’s happening in Syria, leaders of the Asian giant are unlikely to change their pro-Assad position in the wake of Netanyahu’s visit. “China’s central position is to prevent a military intervention aiming to bring down Assad,” Evron said.

The fact that Netanyahu was nonetheless going ahead with the China trip, diplomatic sources said, underlined Israel’s intention to de-escalate tensions with Syria. Furthermore, the sources said, the fact that Israel was privately stressing that the missiles hit in the strike came from Iran, and were intended for Hezbollah, and that Israel reportedly did not enter Syrian airspace but rather carried out the strikes from inside Lebanese air space, was intended to reduce the focus on Syria and thus reduce the likelihood of a Syrian military response.

Army Radio reported Israeli concerns that Hezbollah might seek further Iranian missile shipments, and said the security establishment was therefore remaining on alert. There were likely to be more such Israeli attacks, Channel 10 said.

Activists opposed to the Assad regime reported that a blast hit an ammunition depot in the Qassiyoun mountains late Saturday. It was not clear if that reported incident was related to any Israeli activity. According to a Syrian official who spoke to Al Arabiya, the Syrian regime uses its bases on the mountain to fire missiles at rebel targets in Damascus.

MK Tzachi Hanegbi (Likud), a former chairman of the Knesset’s Foreign Affairs and Defense Committee, said Sunday it was unlikely Syria would hit back at Israel, but did not rule this out. “A Syrian retaliation is always an option,” he conceded, “but apparently it was deemed to be a long shot.”

“Iran is testing Israel’s and the US’s determination to uphold ‘red lines.’ And what it is seeing in Syria is that at least some of the actors take red lines seriously,” said former IDF intelligence chief Amos Yadlin.

Iran’s Foreign Ministry spokesman condemned Sunday’s Israeli airstrike, but gave no hint of a possible stronger response from Tehran or its allies. Ramin Mehmanparast urged countries in the region to remain united against Israel.

“As a Muslim nation, we back Syria, and if there is need for training we will provide them with the training, but won’t have any active involvement in the operations,” Iranian general Ahmad Reza Pourdastan said in remarks reported by the official IRNA news agency.

“The Syrian army has accumulated experience during years of conflict with the Zionist regime and is able to defend itself and doesn’t need foreign assistance,” he added.

AP contributed to this report.