An important Syrian government supply route to Aleppo was shut for a second day on Tuesday because of an ISIS attack, the Syrian Observatory for Human Rights said.
A rebel fighter told Reuters that the ISIS assault on the road linking Aleppo to government-held cities further south had relieved pressure on insurgents confronting Syrian government forces backed by Russian air strikes in Aleppo.
A Syrian military source told Reuters army operations were continuing in order to repel the ISIS assault on the road linking government-held cities of western Syria with Aleppo.