Clashes between Libyan government forces and Islamist-backed militiamen on Friday killed four militants, a security source said, and one person died in a mortar attack on Tripoli's only functioning airport.

The fighting broke out when armed men launched an assault on the edges of Aziziya, a town just 35 kilometers (22 miles) south of Tripoli, the source said.

The head of Libya's rival government has rejected his sacking by the Tripoli-based parliament, suggesting he retains the support of powerful militia allies.

Libya has had two governments and parliaments since Tripoli was seized in August by the Islamist-backed Fajr Libya militia coalition and the internationally recognized government fled to the country's far east.

Exiled former Malian leader Amadou Toumani Toure has given evidence in a probe into alleged Libyan funding for Nicolas Sarkozy's 2007 French presidential election campaign, an aide said Tuesday.

Toure, who has been in the Senegalese capital Dakar since being overthrown in a March 2012 coup, was summoned by Senegalese detectives following a formal request from France, the aide said.

A U.S. congressional panel investigating the 2012 Benghazi attacks has called for Hillary Clinton to testify by May 1, following a scandal involving her exclusive use of private emails while secretary of state.

Trey Gowdy, chairman of the House Select Committee on Benghazi, made the request Tuesday after Clinton rejected his earlier demand that she turn over her private computer server, on which her emails were stored, to U.S. officials for a third-party review.

The leader of the disputed government in Tripoli, Omar al-Hassi, was sacked Tuesday by the parliament in the Libyan capital, which is under the control of an Islamist-backed militia, a lawmaker said.

"The head of the government was dismissed by the parliament in a vote on Tuesday that was backed by the rest of the ministers," Mahmoud Abdel Aziz told AFP.

Libyan antiquities officials looked on with horror at Internet video footage that showed Islamist extremists wielding sledgehammers and power tools to grind ancient Iraqi treasures into dust.

They fear the Islamic State group jihadist movement's growing influence means the fate that befell these priceless Assyrian and Akkadian artefacts now awaits their own rich heritage dating back millennia.

A Filipino oil worker has been killed and five others wounded in a rocket attack on a coastal town west of the Libya capital, a Libyan security source said on Monday.

Three other Filipino oil workers were wounded in Sunday's attack on Zawiya, 40 kilometers (25 miles) west of Tripoli, the source said.

The U.N. Human Rights Council decided Friday to send a mission to war-torn Libya to investigate a range of abuses by different sides and help bring perpetrators to justice.

The 47-member rights body adopted by consensus a resolution asking the U.N. rights chief to "urgently" dispatch a team of investigators to Libya.

The U.N. Security Council is expected to adopt on Friday a resolution to step up the fight against Islamic extremists in Libya but without lifting the arms embargo.

Libya, backed by Egypt, had asked for an end to the arms embargo to allow the embattled government to build up its army and take on groups such as Islamic State (IS).

Morocco, on guard against attacks like the Tunis museum massacre, prides itself on being a bastion against Islamist extremism with its anti-jihadist "FBI" and training of imams to preach tolerance.

More than 130 "terrorist cells" have been dismantled, 2,720 suspects arrested and 276 plots foiled since 2002, according to Abdelhak Khiame, director of the newly established Central Bureau of Judicial Investigations.