TRIPOLI: ISIS Sunday declared “war” on the powerful Libya Dawn militia alliance that controls Tripoli and claimed a suicide bombing that killed five of its fighters.

The dawn blast in northwest Libya is the latest in a series of attacks by ISIS in the politically divided North African country, where the jihadis have exploited chaos to gain a growing foothold.

“A car suicide bomber blew himself up near a checkpoint at an entrance of Dafniya,” between the town of Zliten and Misrata, a spokesman for Libya Dawn said.

The attack killed five fighters and wounded seven others, he added. The LANA news agency of the militia-backed Tripoli administration gave a similar account of the attack, and also reported that five were dead.

The militant group claimed responsibility for the attack in a message posted on Twitter, identifying the suicide bomber as a Tunisian named Abu Wahib al-Tunsi.

The jihadi group also warned Libya Dawn to be ready for “war.”

“The apostates of Fajr Libya [Libya Dawn] ... must know that a war is coming to cleanse the land of their filth unless they repent and go back to their true religion,” the extremist group said.

Libya plunged into chaos after the 2011 NATO-backed uprising that toppled and killed longtime dictator Moammar Gadhafi, with battle-hardened former rebels armed with heavy weapons carving out their own fiefdoms.

Libya Dawn, an alliance of armed groups including Islamists opposed to the extremist religious views of ISIS, seized power in Tripoli last year.

It installed a new government and parliament in the capital, prompting the administration recognized by the international community to flee to the east of the country.

Sunday’s attack comes a day after Libya’s recognized government called on the international community to provide it with weapons to battle ISIS.

A statement warned that ISIS plans on seizing “oil fields to fund its operations,” as it has done in Syria and Iraq where the jihadis last year set up a “caliphate” straddling both countries.

The government’s plea comes after ISIS Thursday seized control of the airport in Sirte, Gadhafi’s hometown east of Tripoli, after Libya Dawn fighters withdrew from the facility.

It was the first time that ISIS in Libya has recorded such a military gain. The Gardabiya airport, which is also a military base, lies just 150 kilometers from Libya’s so-called “oil crescent” – home to key oil fields and export terminals.

Officials in Tripoli said that ISIS had allied with supporters of the ousted Gadhafi regime to deploy across Sirte.

Sirte has been rocked by sporadic fighting between ISIS and Libya Dawn since February, when jihadis deployed in the city, capturing government buildings and the university.

The city, located 450 kilometers east of Tripoli, was already a bastion of Islamist extremist groups, including Ansar al-Shariah.

The radical group is classified by the United States as a “terrorist” organization and suspected of involvement in the 2012 attack on the U.S. consulate in the second city of Benghazi.

Tripoli officials say that ISIS, which also has positions in the eastern city of Derna, has “sleeping cells” in the capital, where the group has already claimed several attacks.

In a bid to find a solution to the crisis, the U.N. has for months struggled to broker a deal between warring parties through the creation of a national unity government.

AU.N.-sponsored meeting in neighboring Tunisia of Libyan mayors and municipal representatives Saturday night ended with a declaration calling for the “swift formation of a government of national accord.” 

Special envoy Bernardino Leon said Thursday that the U.N. was preparing a new draft peace agreement which it plans to hand over to the rival factions in the first week of June.