We rushed there after a call and involved in rescue operation.
3 guys from Middle East Technical University intended to climb Demirkazik NW buttress. Route is quite fun and easy in summer but there is only one winter ascent so far because of terrible powder snow on limestone slabs.
We don't know the exact reason but I guess they took a factor 2 fall an their anchor came off. Two of them died instantly, and the leader survived with broken ankles and ribs. He sent an extremely cold night but he did it.
After last years avalanche disaster (4 killed from Hacettepe University) and this accident, everybody is so sad here.