Pakistani police confirmed that a suicide bomber was behind the blast at a public park in the eastern Pakistani city.
The park was particularly busy on Sunday evening due to the Easter holiday weekend.
Police sources claimed the bombing appeared to target “Christian families” because of those out celebrating Easter.
However, authorities were not able to confirm this or deny this.
Mustansar Feroz, police superintendent for the area, said: “Most of the dead and injured are women and children.”
While senior police officer Haider Ashraf said the area was crowded with Christians celebrating Easter.