Last Friday a series of large explosions destroyed the fireworks factory in Sakarya province. Seven people died as a result of their injuries.
The latest casualties were from the gendarmerie security forces carrying explosives from the factory to a stone quarry to be detonated in a controlled explosion, the ministry said.
It said the blast occurred as the explosives were being unloaded. Two of those killed were from a explosives disposal team, it added. Six other people were wounded.