Israel bombarded a Hezbollah position on the Lebanon-Syria border on Monday, a Lebanese security source and a Syrian NGO said.
"Two Israeli raids hit a Hezbollah target on the border of Lebanon and Syria," the source said. The Syrian Observatory for Human Rights said the target was a Hezbollah "missile base".
Residents of Nabi Chit, on the Lebanese side of the border, told AFP they saw flare bombs light up the sky ahead of the raids, which shook their houses.
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Residents in neighbouring areas said they heard planes flying low before the raids.
Nabi Chit is a bastion of Hezbollah, which is helping the Syrian regime battle insurgents. The Shiite group has a suspected weapons store and training camp there.
The Hezbollah television station Al-Manar said there had been "no raid on Lebanese territory", reporting only the "strong presence of enemy planes over the area north of Bekaa" in eastern Lebanon.
Israel did not immediately confirm or deny responsibility for the raids.