Eighteen fighters loyal to Libya’s UN-backed unity government were killed and 120 others wounded in clashes on Sunday with the Islamic State group in Sirte, a medical source said.

A field hospital for the forces backing the Government of National Accord listed the names of the 18 fighters killed in the coastal city, as loyalist forces pushed into the last areas held by ISIS in Sirte.

The pro-GNA forces are pressing a months-long campaign to retake the city from the jihadists, who overran it in June 2015.