Israeli forces have attacked a target on the Syrian-Lebanese border overnight, a western diplomat and a security source said on Wednesday, at a time of growing concern in the Jewish state over the fate of Syrian chemical and conventional weapons, Reuters reported.
The sources, who declined to be named because of the sensitivity of the issue, had no further information about what might have been hit or where precisely the attack happened.
Earlier, the Lebanese army reported a heavy presence of Israeli jets over its territory throughout the night.
"There was definitely a hit in the border area," the source said.
Israel's vice premier Silvan Shalom said on Sunday that any sign that Syria's grip on its chemical weapons was slipping, as President Bashar al-Assad fights rebels trying to overthrow him, could trigger Israeli intervention.
Israeli sources said on Tuesday that Syria's advanced conventional weapons would represent as much of a threat to Israel as its chemical arms should they fall into the hands of Syrian rebel forces or Hezbollah guerrillas based in Lebanon.
In Jerusalem, the Israeli military declined any comment.
"We do not comment on reports of this kind," an Israeli Defense Force spokeswoman said.