A policeman was killed and two others were injured when gunmen opened fire in the IttehadTown area on Tuesday morning.
According to media reports, the deceased identified as Muhammad Boota was posted in Sindh Secretariat.
Two more policemen were injured in gunfire incidents, one near Hassan Square and another in Liaqatabad.
In New Karachi, in an encounter police arrested two dacoits near Power House.
Meanwhile Karachi Police in its operation against criminals conducted 68 targeted raids in different areas of the city during last 24 hours and arrested 78 criminals. Police also recovered illicit weapons and narcotics during raids.