A arsenal in Siwa tuowo of Ukraine exploded at 29^th night, 2 people died and 8 people hurt.This arsenal has 3500 ton bombs. The fire area reached 9000㎡, and nearly 5000 people were evacuated. Due to the continuousexplosion after fire of arsenal, local fire department took action ofoutfire on 30^th morning. Besides, an engineering teamin accident scene took charge of detecting and dealing with the unexploded bombs. According to report of local media, the explosivereasion of this arsenal was still not sure, security bureau of Ukraine has been nestigating the accident.