Violent clashes have erupted between Islamic State-affiliated militants and militias aligned with the Islamist self-declared government near Sirte in central Libya.
After surrounding the Islamic State-controlled city of Sirte for several weeks, the militias are now about 10 miles west of the centre of the city. Other militias fighting their way into Sirte from the east are only 1.8 miles from the centre.
The Tripoli government has previously denied the existence of the Islamic State affiliate. The clashes are among the first known instances of Libya's Islamist-allied militias battling the Islamic State affiliate.
These Islamic State-affiliated militants carried out a deadly attack on a luxury hotel in Tripoli in January, and in February released a video showing them beheading 21 Egyptian Christians.