Four people, including three children were killed and several people injured after a four-story building collapsed in the Lyari area of Karachi on Thursday.
Rescue sources have said many people are still trapped under the debris.
More than 20 people, including women and children, have been rescued from the rubble, while residents of the area are currently helping with the rescue operation. All injured have been shifted to a nearby hospital.
Chief Minister Sindh Qaim Ali Shah has directed Commissioner Karachi to use heavy machinery for rescue work.