Updated

Syria's U.N. ambassador says there is "no truth" to reports that an Israeli airstrike last week which seriously damaged a scientific research center had targeted a convoy heading to neighboring Lebanon.

Israel has all but confirmed it was behind the airstrike a few miles from the Syrian capital, Damascus.

U.S. officials have said the Israelis struck a military research center and a convoy next to it carrying anti-aircraft weapons destined for the Islamic militant group Hezbollah in Lebanon.

Bashar Ja'afari said in identical letters to the U.N. secretary-general and the Security Council, circulated Thursday, that Israeli aircraft flying at low altitude headed to the research center and bombed it, killing two employees and injuring five others.