BEIRUT - Israeli jets bombed Syria on Sunday, rocking Damascus for hours and sending pillars of flame into the night sky in what a Western source called a new strike on Iranian missiles bound for Lebanon's Hezbollah.
Local people reported massive explosions and internet video showed the capital's skyline lit by flashes; Syrian opponents of President Bashar Assad rejoiced at Israel's third raid this year, and second in 48 hours, while anger in Tehran highlighted how Syria's civil war risks spinning further beyond its borders.
Israel, while declining to confirm the strike, stressed its focus was to deny its Lebanese foes new Iranian firepower and not take sides between Assad, long seen as a toothless adversary, and rebels who have won sympathy from Israel's Western allies but who also include al-Qaida Islamists hostile to the Jewish state.
It appears to calculate that Assad will not risk forces he needs to fight the rebels by attacking a much stronger Israel.
Syrian state television said the bombing around a military research facility at Jamraya caused "many civilian casualties and widespread damage" and quoted a letter from the foreign minister to the United Nations saying: "The blatant Israeli aggression has the aim to provide direct military support to the terrorist groups after they failed to control territory."
People living near the Jamraya base spoke of explosions over several hours in various places near Damascus, including a town housing senior officials: "Night turned into day," one man told Reuters from his home near Jamraya, also struck on Jan. 30.
CNN quoted Syrian Deputy Foreign Minister Faisal al-Mekdad calling Sunday's attack a "declaration of war", and the Iranian foreign minister urged countries to resist Israel. But a senior Iranian commander also said Syria was strong enough to defend itself without Tehran's help - though he also offered training.
A confidant of Prime Minister Binyamin Netanyahu said Israel hoped that by not confirming its attack, it would not force its enemies into serious retaliation. There was little response from Hezbollah, Syria or Iran to an earlier attack on the Jamraya compound, near the Lebanese border, on Jan. 30.
After an Israeli strike on Friday, US President Barack Obama defended Israel's right to defend itself from Hezbollah, which fired many rockets into Israel during a war in 2006.
A Western intelligence source told Reuters: "In last night's attack, as in the previous one, what was attacked were stores of Fateh-110 missiles that were in transit from Iran to Hezbollah."
Hezbollah in Lebanon declined immediate comment. Iran denied that the attack was on armaments bound for Lebanon.
It was unclear whether Israel sought US approval for the action; in the past, officials have indicated that Israel sees a need only to inform Washington once such a mission is under way.
Netanyahu and Obama have had a fraught relationship in past years, as Washington seeks to hold Israel back from any attack on Iran's nuclear program while diplomatic moves continue.
At a routine public appearance on Sunday, Netanyahu made no direct reference to the strikes in Syria but spoke pointedly of his responsibility to ensure Israel's future.
He maintained a plan to fly to China later in the day, suggesting he did not expect a major escalation. However, a military source said the army had deployed more anti-missile defense systems near the northern borders in recent days.
Night of explosions
Video footage uploaded onto the Internet by Syrian activists showed a series of blasts. One lit up the skyline of Damascus, while another sent up a tower of flames and secondary blasts.
Syrian state news agency SANA said Israeli aircraft struck in three places: northeast of Jamraya; the town of Maysaloun on the Lebanese border; and the nearby Dimas air base.
"The sky was red all night. We didn't sleep a single second. The explosions started after midnight and continued through the night," one man told Reuters from Hameh, close to Jamraya.
"There were explosions on all sides of my house," he added, saying people hid in basements during the events. In the centre of Damascus, people at first thought there was an earthquake.
Hezbollah's Al-Manar television aired footage showing a flattened building spread over the size of a football pitch, with smoke rising from rubble containing shell fragments. It did not identify where the film was shot.
The streets of central Damascus were almost empty of pedestrians and traffic on Sunday morning, the start of the working week. Checkpoints that have protected the area from rebel attack appeared to have been reinforced.
Some opposition activists said they were glad strikes may weaken Assad, even if few Syrians have any liking for Israel.
"We don't care who did it," said Rania al-Midania in Damascus. "We care that those weapons are no longer there to kill us."
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