According to the preliminary information, the explosion occurred on the third level during repairing works.
The witnesses said one of the men tried to check the fire alarm system in the office and used a smoking pallet, which exploded the moment he fired it. The information on the incident will be verified. The victim has been hospitalized, he is receiving medical aid.
The Police noted that no one was in the room at the moment of the explosion. The whole personnel involved in the repairing works was evacuated.