According to Ummat newspaper, members of the Takfiri group launched the attack near Dar ul-Ulum school in the southern port city on Friday.
Three police officers as well as ten-year-old Zahid were shot dead in the terrorist incident by six heavily-armed gunmen riding on motorcycles.
The drive-by shooting took place in the Korangi neighborhood of the violence-hit city.
Medical sources earlier said that three bodies were brought to the hospital following the shootout and that a fourth person, who was wounded, died during treatment.
Investigators have collected from the crime scene 45 bullet casings of 9mm pistols.
Karachi has been wracked by political, ethnic and sectarian violence over the past two and a half decades.
In June 2014, a deadly raid on Jinnah International Airport in Karachi ended the government’s faltering peace talks with pro-Taliban militants. Since then, Islamabad has been engaged in a major offensive against militant hideouts.
http://iqna.ir/fa/news/3621925