At least one security person was killed and 13 injured on Thursday when a massive blast took place at a paramilitary force's headquarters in Pakistan's port city of Karachi, a media report said.
The bombing happened at about 7 a.m. near the main gate of the headquarters of Rangers, a paramilitary force, in the Nazimabad area of Karachi, reported Xinhua citing Geo TV.
Another TV channel said that it was a suicide car bomb attack.
Following the blast, part of the headquarters building collapsed and caught fire.