In the first incident, three people were killed in a firing incident in the Bihar Colony of the troubled Lyari neighborhood.
Soon after the incident, heavy contingents of the law enforcement agencies reached the site and cordoned off the area.
The bodies of the deceased, identified as Nadeem, Shoaib Nagori and Shani, were shifted to Civil Hospital for medico-legal formalities.
Read: Target killing: Lawyer shot dead in Karachi
Hours later, in another incident two were injured when miscreants hurled a hand-grenade at a gambling den in Malir.
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