Israeli F-15
Israeli F-15Israel news photo: Flash 90

The United States would not comment on Wednesday when asked whether Israel had carried out an airstrike in Syria.

“I don’t have any comment for you on those reports. I'd refer you to the government of Israel for questions about deliberations or actions that they may or may not have taken,” said White House Spokesman Jay Carney when asked whether President Obama was aware of the attack and endorsed it.

U.S. State Department Spokeswoman Victoria Nuland had similar comments, saying, “Without going into intelligence matters, we are concerned about the relationship between the Syrian regime and Hizbullah and Iran.”

On Wednesday evening, Syria accused Israel of staging an air raid on a military research center.

The Syrian army accused Israel of launching a dawn strike targeting a military research center in Jamraya, near Damascus, in a statement carried by state news agency SANA and quoted by AFP.

"Israeli fighter jets violated our airspace at dawn today and carried out a direct strike on a scientific research center in charge of raising our level of resistance and self-defense," the general command said.

"They... carried out an act of aggression, bombarding the site, causing large-scale material damage and destroying the building," state television quoted the military as saying.

Earlier reports said that Israel had struck a convoy carrying Russian-made antiaircraft missiles. It is not clear at this point which report is the more accurate one, and what actually happened.