ANKARA, March 20 (Xinhua) -- Four people were wounded in an explosion that took place at a gunpowder factory in the Turkish capital of Ankara on Wednesday, Turkish media reported.
The injured, two of them in critical condition, were moved to hospitals for receiving medical treatment, the report said.
According to the report, there was a fire following the explosion and then it was extinguished by firefighters.
The cause of the blast is still unknown, the report added.