An Islamist militant group has executed 41 fighters from Al-Qaeda's former Syria affiliate and allied factions in infighting between the extremists in Syria's Idlib province, a monitor said Friday.

The Syrian Observatory for Human Rights said the Jund al-Aqsa group had executed the 41 fighters in the town of Khan Sheikhun on Monday but the deaths were only confirmed on Friday amid fierce fighting between the Islamist militant factions.