A Romanian officer has been killed in a blast at a military laboratory dealing with nuclear, biological and chemical research, Romanian officials say.
The defence ministry says the man, aged 37, died of his injuries after the explosion in Bucharest.
The cause of the blast was not immediately known, but the ministry says it "does not pose any threat to the population" and there was no fire.
It says an investigation is now under way into the accident.
The officer who died was identified by the military officials as Octavian Viorel Mihai.
At least two other people were injured in the explosion.
Romanian defence ministry spokesman Costi Spanu said the laboratory did not handle materials "that could cause panic", the Associated Press news agency reported.