By EDITH M. LEDERER

Associated Press

UNITED NATIONS (AP) — The U.N. Security Council on Friday called on Libya’s warring parties to urgently de-escalate fighting and commit to a cease-fire, and it condemned a deadly attack on a detention center for migrants near the capital Tripoli.

The U.N.’s most powerful body also called on the parties to rapidly return to U.N.-mediated political talks.

The council press statement was the first approved by all 15 members since self-styled Libyan National Army leader, Field Marshal Khalifa Hifter, launched a military offensive on April 4 aimed at taking Tripoli, though it had previously issued weaker press “elements.”

The statement was spurred by Tuesday night’s airstrike on the detention center in Tajoura, which the council said killed 53 people and injured over 130 others. The Security Council held emergency closed consultations Wednesday afternoon, but diplomats said then that the United States needed additional time to consider the text of a statement condemning the attack.

A U.N.-supported, but weak government controls Tripoli, overseeing the country’s west, while a rival government aligned with Hifter controls much of the east and south. Each is backed by an array of militias and armed groups fighting over resources and territory.

The Tripoli-based government blamed Hifter’s LNA and its foreign backers for the airstrike.