The first blast took place in Singo Lane area whereas another occurred in Chakiwara, both areas of Lyari.
Among the injured are four women and six-year-old girl. They have been shifted to Civil Hospital. Five of the injured are said to be in critical condition.
The incident took place near a local hotel on a group of people returning from a wedding. Local gangsters threw the cracker blast and escaped from the scene.
Another blast occurred near a petrol pump in Chakiware with the remits of Rangiwara police station. This one several including eight-year-old child named Arman.
The situation in the area is sensitive where police are undergoing investigations. IG Sindh AD Khawaja had taken notice of the incident and sought a report in this regard.