A car bomb exploded Monday in the Libyan capital, wounding one person and causing damage to the offices of an oil company co-owned by Italy's Eni, a security official said.

The target of the blast was not clear, and there was no immediate claim of responsibility.

Libyan pro-government forces on Monday battled jihadists from the Islamic State group in second city Benghazi, where five pro-government fighters have been killed in two days of violence, media said.

Four loyalist soldiers died and 22 were wounded on Sunday in clashes with IS in the southern district of Hawari, the pro-government LANA news agency reported.

Another boat carrying migrants has sunk off Libya and the bodies of at least seven people have been washed up, Libya's Red Crescent said on Sunday.

"We were alerted that a boat had sunk and that there are bodies on the beach in Khoms," 120 kilometers (75 miles) east of Tripoli, Red Crescent spokesman Mohammad al-Misrati told AFP.

Rescuers have retrieved from the sea the bodies of 111 migrants whose boat sank off the coat of Libya, the Red Crescent said on Saturday in a new toll.

A spokesman for the Libyan relief organisation said dozens are still missing after Thursday's tragedy.

A U.N. envoy urged Libya's warring factions Friday to speed up peace talks to help curb accidents in which hundreds of migrants have drowned off its shore as well as persistent bloodshed at home.

Bernardino Leon told a news conference in Skhirat near the Moroccan capital that the target was to sign an agreement on the formation of a unity government by September 20.

Italian authorities said Friday they had arrested ten suspected people smugglers in connection with the deaths by asphyxiation of 52 people who had been forced to remain in the virtually airless hold of an overcrowded migrant boat.

The arrests follow statements made by survivors rescued from the same boat earlier this week and taken to Palermo in Sicily.

Pakistani teenager Shefaz Hamza spent nine hours at sea clinging to the wreckage of a migrant boat that sank off Libya. By the time the coast guard arrived his mother and young sister were dead.

They were among at least 76 people to die when their boat went down Thursday off the western Libyan port of Zuwara, Red Crescent spokesman Mohamad al-Misrati told AFP.

At least 76 people have died after a ship carrying hundreds of migrants and refugees sank off the coast of Libya, a spokesman for the Libyan Red Crescent said Friday.

The United Nations refugee agency, UNHCR, said as many as 200 people on two boats were feared dead.

The United Nations peace envoy for Libya said Wednesday he was confident that the past seven months of talks will yield an agreement on ending the violence in the north African country.

"I am increasingly confident that the process is finally drawing to its final stages," Bernardino Leon told the U.N. Security Council.

The bodies of around 40 people were found on Wednesday in the hold of a stricken migrant boat off the coast of Libya, the Swedish coastguard said.

The macabre discovery was made after Swedish ship the Poseidon was sent to the aid of the stricken vessel by the Italian coastguard, which said it was simultaneously coordinating rescue operations for multiple boats carrying at least 2,000 people.