Fear gripped the Quaid-e-Azam colony when unidentified people riding a car dumped dead bodies there and fled from the scene.
Residents of the area said they had informed the local police station about the incident but no action was taken.
In an encounter on Nishtar Road, police arrested three accused and recovered weapons from their possession.
Meanwhile, Sindh Chief Minister chaired a session of PPP ministers and discussed the law and order situation in Karachi.
The ministers decided to launch a campaign in Karachi with the help of the media, NGOs and civil society organisations.
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