The UN is "making every effort to secure the release" of 43 peacekeepers detained by an armed group near Al Quneitra in the Golan Heights.
A further 81 peacekeepers are "currently being restricted to their positions" near Ar Ruwayhinah and Burayqah, the UN said.
The nationalities of the peacekeepers, who were serving with the UN Disengagement Observer Force Zone (UNDOF), is not clear. As of 31st July, there were peacekeepers from Ireland, the Netherlands, Fiji, Nepal, India and the Philippines serving in the force.
Syrian jets shelled rebel positions near the Quneitra border crossing between Syria and the Israeli-occupied Golan Heights and fighting in the area is ongoing.
More top news
Two passenger trains have derailed while crossing a bridge in India, leaving at least 20 people dead and injuring hundreds more.
Actor Pierce Brosnan was stopped by airport security after trying to board a plane with a knife.
Children are risking their lives by playing "chicken" on motorways during the school summer holidays, police say.