GENEVA (Reuters) -The United Nations refugee agency expressed concern on Friday about the impact of hostilities in Syria's southern city of Sweida on its aid operations, and urged all sides to allow more humanitarian access.

Despite reports indicating the strike was carried out by Israel, Channel 12 reported that the Israeli military had not conducted the strikes. Israel carried out an airstrike in the vicinity of Syria's Sweida,

Syrian government forces largely pulled out of the southern province of Sweida on Thursday after days of clashes with militias linked to the Druze minority that threatened to unravel the country's postwar transition.

UN rights chief Volker Türk on Friday called for investigations and justice after days of deadly sectarian violence in southern Syria reportedly left nearly 600 dead.

The Syrian Observatory for Human Rights reported "clashes west of Sweida pitting tribal fighters and Bedouin supported by the authorities on one side, against Druze fighters on the other". Combatants on both sides confirmed the exchange of fire to AFP correspondents.

Under Israeli bombardment and diplomatic pressure, Ahmed al-Sharaa pulled troops from Syria's Druze heartland -- a move that exposes the interim leader's weakness just as he sought to assert control.Since seizing office in December after ousting longtime autocrat Bashar al-Assad,