According to the police, unknown armed men gunned one person in Dawood Chorangi area of Landhi.
Two citizens were shot dead in Maleer and Gulshan Mayamar areas. Two men was killed in firing incident in Orangi town area.
Karachi Police chief Shahid Hayat said that four people were killed and at least 15 injured when unknown miscreants hurled a hand grenade at a Imambargah in Gulsan-e-Bahar Chowk area of Landhi.
Chief Minister Syed Qaim Ali Shah summoned report regarding incident from IG police Shahid Nadeem Baloch.
Meanwhile four people were killed in separate firing incidents in different areas of the city .
The police and Rangers during targeted operation in various areas including Ittehad Town, Shah Rasool Colony, Clifton, Nazimabad and other areas of the city rounded up 123 suspects and recovered arms and drugs from their possession.