"Eight suspected militants were killed in the Pipri area while four others were latershot dead in Gadap on the outskirts of the city," Senior Superintendent of Police in Malir district, Rao Anwar told reporters.
"They all belonged to outlawed militant outfits and opened fire on the raiding parties of police when they raided their hideouts oncreditable tip-offs," Anwar said.
"In Pipri, the militants were heavily armed and opened fire after which the police retaliated and killed eight of them," he said.
Anwar said five of those killed had been identified as Sohail, Khalil, Bilal,Talha and Abdul Salam.
The police official said that the raids were conducted after information provided by two recently arrested high profile terrorists, Naeem Bukhari and Farooq Bhatti, adding that the deceased men belonged to Al-Qaeda in the Indian Subcontinent and Lashkar-i-Jhangvi (LeJ).
He said police had recovered heavy cache of suicide vests, explosives and hand grenades from the hideout in Pipri.
Karachi, a city of over 20 million and Pakistan's financial hub, is one of the most unsafe cities in the country and is frequently the scene of religious and ethnic violence.
