CAIRO — An Al-Qaeda group in Syria said one of its top commanders was killed in an ambush by rival Western-backed rebels in a northern province.

It was the latest in rising infighting among rebel groups in northern Syria, where the opposition controls large swaths of territory captured from President Bashar Assad’s troops earlier this year.

The group, known as the Islamic State of Iraq and the Levant, said its commander in Idlib province, Abu Abdullah al-Libi, was ambushed by members of the Free Syrian Army near a border crossing with Turkey.

The statement said the attackers sprayed the car with bullets on Sunday, killing al-Libi. The name is a nom de guerre.

The statement could not be independently confirmed but was posted on a commonly-used militant website.

Copyright 2013 The Associated Press.