Syria’s civil war entangled the United Nations peacekeeping operation in the disputed Golan Heights area between Syria and Israel on Wednesday, when 30 armed fighters for the insurgency detained a group of 20 peacekeepers investigating a damaged observation post, the United Nations said. It was the first time that members of the Golan peacekeeping mission, officially known as the United Nations Disengagement Observer Force, had been detained by any of the combatants in the Syrian conflict, although the Golan region has been periodically affected by armed clashes and occasional artillery or mortar bombardments that have become a source of concern...