A group of terrorists barricaded a road and set cars on fire in Dallıağaş district, TRT reported on Sunday
An explosive device, planted on the route of security forces vehicle, blasted when they were on their way to intervene the incident.
Two special sergeants were killed in the blast and two others were wounded.
One of the wounded soldiers could not survive despite the medical help and died at the hospital he was receving treatment.
Diyarbakir Military Hospital is rendering treatment for the other wounded soldier.
Security forces have launched a comprehensive operation in the region and it is still underway on Sunday.
Meanwhile, a police officer was killed in Bitlis province's Tatvan town in a fire opened at the police lodging buildings.