BEIRUT -- Syria threatened Thursday to retaliate for an Israeli airstrike and its ally Iran said the Jewish state will regret the attack.
Syria sent a letter to the UN Secretary-General stressing the country's "right to defend itself, its territory and sovereignty" and holding Israel and its supporters accountable.
"Israel and those who protect it at the Security Council are fully responsible for the repercussions of this aggression," the letter from Syria's Foreign Ministry said.
U.S. officials said Israel launched a rare airstrike inside Syria on Wednesday targeting a convoy carrying anti-aircraft weapons bound for Hezbollah, the powerful Lebanese militant group allied with Syria and Iran.
In Israel, a lawmaker close to hard-line Prime Minister Benjamin Netanyahu stopped short of confirming involvement in the strike. But he hinted Israel could carry out similar missions in the future.
The attack has inflamed regional tensions already running high over Syria's 22-month-old civil war.
Israeli leaders in the days leading up to the airstrike had publicly expressed concern Syrian President Bashar Assad may be losing his grip on the country and its arsenal of conventional and non-conventional weapons.
The Syrian military denied any such weapons convoy. It said low-flying Israeli jets crossed into the country over the Israeli-occupied Golan Heights and bombed a scientific research centre. The facility is in the area of Jamraya, northwest of Damascus and about 15 kilometres from the Lebanese border.
A U.S. official said the airstrike targeted trucks containing sophisticated Russian-made SA-17 anti-aircraft missiles. The trucks were next to the military research facility identified by the Syrians, and the strike hit both the trucks and the facility, said the official, who spoke on condition of anonymity because he was not authorized to speak about the operation.
If the SA-17s were to have reached Hezbollah, they would have greatly inhibited the Israeli air force's ability to operate in Lebanon, where Israel has flown frequent sorties in recent years.
Maj. Gen. Abdul-Aziz Jassem al-Shallal, who in December became one of the most senior Syrian army officers to defect, told The Associated Press by telephone from Turkey the targeted site is a "major and well-known" centre to develop weapons called the Scientific Research Center.
Al-Shallal, who until his defection was commander of the military police, said no chemical or non-conventional weapons are at the site. He added foreign experts, including Russians and Iranians, are usually present at such centres.
Syrian Ambassador to Lebanon Ali Abdul-Karim Ali threatened retribution for the Israeli airstrike, saying Damascus "has the option and the capacity to surprise in retaliation."
-- The Associated Press