Bodies of ISIS militants piled onto a pickup truck following the failed attack

At least 60 ISIS militants were killed after a failed attack on Misrata-led forces in Sirte on Sunday.

Military sources said an ISIS convoy attacked at dawn a checkpoint for Brigade 166 in south Sirte in a bid to encircle the brigade and lift the siege on their fellow radicals trapped inside Sirte.

"The ISIS convoy came from the desert, all the attackers were foreigners, they were all killed," the sources added.

The sources suggested that the ISIS convoy may have fled Sirte at the beginning of the military operation in May.