According to officials, police conducted searches in Bilal Colony, Rashidabad, Pahar Ganj and DeSilva Town areas. The law enforcers arrested 39 suspects, who were shifted to different police stations for further interrogation.
From arrested suspects officials also have seized arms and a stolen motorbike.
Four more suspects were held in raids conducted in New Karachi , Azizabad and Joharabad areas.
SP Gulberg Bashir Brohi said, the suspected target killer , Umar Farooq alias Charya, was apprehended from Joharabad following a tip-off.
He said, the suspect, affiliated with Muttahida Qaumi Movement-London, had killed five people in Baloch Goth in 1995.
From North Karachi Sector 11-A another robber was also apprehended, who along with accomplices was trying to rob owner of an oil depot.
However, upon resistance by the owner, the suspects attempted to flee the scene while firing gunshots.
The police said, one of the robbers was said to be injured in firing by accomplices, injured have been shifted hospital for treatment.