DUBAI: ISIS claimed to have seized full control Tuesday of the Libyan city of Sirte from the Libya Dawn militia, including a power plant, according to a U.S. monitor.

SITE Intelligence Group said the jihadi group had published photographs of “ISIS fighters engaged in clashes, sitting atop heavy guns, exploring the power plant and town, as well as bodies of dead Fajr Libya [Libya Dawn] fighters.”

The claim comes nearly two weeks after ISIS overran the airport in Sirte – the hometown of slain dictator Moammar Gadhafi – in the group’s first such military gain in Libya.

SITE quoted a report in which an ISIS division that calls itself “Tripoli Province” said “soldiers of the caliphate” seized control of the last locations of Libya Dawn gunmen in Sirte.

The report said Sirte would now “be the coastal city linking the east and west of Libya under full control of ISIS fighters.”

It said the capture of Sirte came after clashes that erupted at dawn saw the Libya Dawn fighters lose all entrances to the city and the power plant, as well as the Al-Jallit military camp and Al-Qardhabiyah base.

Meanwhile, the elected parliament, based in eastern Libya, rejected a United Nations proposal to form a unity government for Libya and withdrew from the talks aimed at ending the crippling power struggle. Libya’s official government has been based in the east since a rival faction seized Tripoli in August, setting up a rival administration.

The decision was a blow to efforts by U.N. Special Envoy Bernardino Leon, who presented the draft proposal Monday after hosting months of talks between the rival sides.

Four years after a NATO-backed uprising, the conflict has battered Libya’s oil industry and allowed ISIS militants to exploit the security vacuum and expand.

The eastern parliament has banned its delegates from traveling to Germany for a meeting with European and North African leaders to discuss Leon’s proposal, lawmaker Tareq al-Jouroushi told Reuters.

“A majority of deputies voted to reject the proposal,” he said by telephone from Tobruk, an eastern city where the House of Representatives is based.

Fradj Abou Hashem, spokesman for the parliament, said anyone from his delegation who goes to Berlin would be doing so on a personal basis only.

Leon submitted his fourth proposal for a unity government and delegates from both factions had been expected to head to Germany before returning for consultations and then traveling to Morocco for more talks.

The U.N. proposal calls for a yearlong government of national accord, where a council of ministers headed by a prime minister with two deputies will have executive authority.

Jouroushi said lawmakers objected to including the Tripoli parliament in the U.N. proposal. “The proposal does not reflect the legitimacy of the elected parliament,” he said.

The 69-article plan provides for the formation of a transitional government of national unity for a period of one year.

It stipulates that the parliament elected last June, most of whose members back the government in Tobruk, should be the legislative authority in the interim.

But the 120-member State Council consultative body, most of whose members would be drawn from the General National Congress, would be able to “express binding opinion with a qualified majority on draft laws.”

Abou Hashem said his side was unhappy with the “prerogatives given to the council.”

Under the proposed deal, the sides would also commit to integrating their militias into a reformed military under direct government control, with former rebel fighters offered the opportunity to join up or be reintegrated into civilian life.

The agreement sets out interim security arrangements for the withdrawal of armed formations from towns and cities, as well as a timetable for disarming.

G-7 leaders have thrown their support behind Leon’s efforts to persuade the factions to forge a united administration to replace the rival governments in Tripoli and Tobruk.