ISLAMABAD, Aug. 3 (Xinhua) -- Two policemen were killed and two others injured in a hand grenade blast on Wednesday in Pakistan's southern port city of Karachi, police said.
According to a spokesperson of police, the blast occurred during an inspection at Garden Police Headquarters.
The victims were shifted to a local hospital, police said, adding that the two deceased and an injured were constables while the other injured was a sub-inspector of police.
Police said that investigations of the incident are underway. ■