Armed men have attacked an overcrowded dinghy carrying migrants off Libya, leaving at least four dead and up to 25 missing, the German NGO Sea-Watch said Friday.

Libyan pro-government forces killed at least 10 Islamic State group jihadists as they attempted to flee their besieged stronghold of Sirte, the country's unity government said Sunday.

Conflict-hit Libya could run out of money next year without a swift resumption of oil exports, the head of the country's National Oil Corporation (NOC) warned on Thursday.

Ten jihadists and three pro-government fighters died in clashes Thursday around the last positions of the Islamic State group in the Libyan coastal city of Sirte, medical and military sources said.

Two car bombs went off in the Libyan capital Tripoli on Thursday morning, damaging nearby vehicles but causing no casualties, said a security official. 

Libya pro-government forces backed by U.S. air strikes said Sunday they would soon launch a final assault to retake the coastal city of Sirte from the Islamic State jihadist group.

The United States has opened a new front in its campaign against the Islamic State group, launching air strikes to support Libyan forces battling to oust the jihadists from Sirte.

Key dates since the Islamic State group (IS) moved into Libya in 2014 amid the chaos that followed the ouster of Moammar Gadhafi in 2011.

France on Tuesday reaffirmed its "full support" for Libya's unity government, seeking to mend fences after the interim leader demanded an explanation for the presence of French troops in the east of the conflict-ridden country.

The head of Libya's unity government has asked for an official explanation from Paris about the presence of French troops in the conflict-ridden country, a statement said on Tuesday.