Islamabad, Aug 3 Two policemen were killed and two others injured in a hand grenade blast on Wednesday in Pakistan's southern port city of Karachi.
According to a spokesperson of police, the blast occurred during an inspection at Garden Police Headquarters.
The victims were shifted to a local hospital, Xinhua news agency reported quoting police.
The two deceased and an injured were constables while the other injured was a sub-inspector of police.
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