Fighting between rival tribes in the mountains of western Libya has claimed 14 lives and left dozens wounded in the past two days, the government said on Wednesday.

"Fourteen people were killed and about 89 wounded in combat in the Nafusa mountains," Nasser al-Manaa, spokesman of the interim government, told journalists in Tripoli.

A Libyan official said on Wednesday that the detention of four International Criminal Court envoys was "a matter of national security" to be weighed by local judges.

"It is a matter of national security," government spokesman Nasser al-Manaa told journalists in Tripoli.

Turkey has struck a one-million-ton oil supply deal with Libya after reducing imports of Iranian crude under pressure from the United States and international community, the Turkish energy minister said Tuesday.

Turkey's sole oil refiner Tupras agreed the deal with Libya and has started negotiations with Saudi Arabia for a long-term contract, Energy Minister Taner Yildiz was quoted as saying by the Anatolia news agency.

An alleged Libyan jihadist group has claimed responsibility for last week's bombing of the U.S. consulate in Libya's main eastern city of Benghazi, the SITE monitoring service said Monday.

The "Brigades of the Imprisoned Sheikh Omar Abdul Rahman" said the attack was to avenge the death of Al-Qaeda number two Abu Yahya al-Libi in a drone strike in Pakistan, said the US-based SITE, which monitors jihadi websites.

Foreign Minister Adnan Mansour said the Lebanese charge d’affaires in Libya was tasked with following up the arrest of Lebanese interpreter Helene Assaf along with three envoys from the International Criminal Court.

The charge d’affaires will provide us with the latest developments on the case, Mansour told MTV after a judicial source said on Monday that Libyan authorities put the four envoys in "preventive" detention in prison for 45 days while investigating an alleged threat to national security.

Libya has put a team of four International Criminal Court envoys in "preventive" detention in prison for 45 days while investigations are conducted, a judicial source said on Monday.

"A decision was made to put them in preventive detention for 45 days while investigations are conducted," an official in the attorney general's office told Agence France Presse on condition of anonymity.

An Australian lawyer and a Lebanese interpreter detained after meeting Seif al-Islam were being investigated for the crime of spying and complicity, a Libyan official said as an International Criminal Court team arrived in Tripoli to try to secure their release.

"The delegation just arrived now to negotiate with the Libyan authorities and the prosecutor general for the (ICC) team's release," Ahmed Jehani, Libya's envoy to the international tribunal, said on Sunday.

Libya on Sunday announced that elections for the country's constituent assembly, initially slated to be held by June 19, had been postponed to July 7.

"The date for the elections will be July 7," the president of the electoral commission, Nuri al-Abbar, told a news conference in Tripoli, citing "logistical and technical" reasons for the delay.

Members of Libya's Toubou minority and government forces fought for a second consecutive day on Sunday, with the death toll rising to 23, tribal sources and a local military commander said.

Doctor Taher Wehli said 20 members of his Toubou community, including women and children, were killed since fighting erupted in Kufra on Saturday, with more than 50 other people wounded.

Elections in Libya for a constituent assembly, originally set to be held by June 19, are to be postponed for logistical reasons, electoral commission members said on Saturday.