Gunmen killed two people and wounded a third in an attack at the South Korean embassy in the Libyan capital Tripoli on Sunday which was claimed by the Islamic State group.

The gunmen opened fire on the embassy compound from a passing car, killing two people and wounding a third, a Libyan interior ministry spokesman told AFP.

The United Nations on Saturday condemned a fresh outbreak of violence in Libya, just as rival factions prepare to resume talks on forming a government to halt the country's conflict.

Pro-government forces clashed Friday and Saturday with fighters from the Islamist-backed Fajr Libya militia alliance in Aziziya, a town 35 kilometres (22 miles) west of Tripoli.

A delegation of Libyan lawmakers recognized by the international community will head to Washington next week as part of U.N. efforts to create a stable unity government in the war-torn country, the U.S. State Department said Friday.

"We look forward to discussing their work with the U.N. Special Representative (Bernardino) Leon in support of the U.N.-led process to constitute a national unity government," State Department spokesman Jeff Rathke said about the delegation from Libya's House of Representatives.

The EU warned Friday that anyone sabotaging talks on forming a Libya national unity government will be held responsible by an international community desperate to get the rival factions to agree a deal.

"All groups in Libya should refrain from actions that increase tensions at a time when Libyan parties are engaged in a decisive stage of the political dialogue," European Union foreign affairs head Federica Mogherini said.

The Customs' anti-narcotics unit seized overnight a vegetable truck loaded with drugs, As Safir newspaper reported on Friday.

Finance Minister Ali Hassan Khalil revealed to the newspaper that the truck was coming from the Bekaa and the drugs were going to be smuggled to Egypt.

As talks between Libya's rival factions drag on, experts say there is little hope of a political deal and are warning of protracted civil war and a rise in Islamic extremism.

Since the 2011 overthrow of Moammar Gadhafi in a NATO-backed uprising, Libya has been wracked by conflict, with rival governments and powerful militias battling for control of key cities and the country's oil riches.

Libya's internationally recognized parliament said Tuesday it has uncovered "new elements" behind the 2012 assassination of the U.S. ambassador when the American consulate was stormed in eastern city Benghazi.

"I have been tasked today with leading a team of inquiry," Tareq Saqar al-Jeruchi, deputy head of the parliament's security and defense committee, told AFP.

Security forces succeeded in thwarting an attempt to smuggle 3.5 tons of cannabis from Lebanon to Libya, the anti-drug bureau announced in a statement on Monday.

The drugs were transported from Lebanon to a ship, called Mare Ta Queen, which was docked outside of Lebanon's regional waters.

A suicide bomber killed four people outside Libya's militia-controlled third city Misrata on Sunday in an attack claimed by the Islamic State group.

The LANA news agency of the militia-backed Tripoli administration said 21 people were also wounded when the bomber blew up a vehicle packed with explosives at the Saddada checkpoint east of the city.

The sprawling palace compounds from which Libyan leader Moammar Gadhafi ruled for four decades have been reduced to garbage dumps and pet markets by the 2011 revolution which toppled him.

In the heart of Tripoli, the once feared but now humbled Bab al-Aziziya compound resembles a wasteland.