The building located in Choori Mohalla of Hyderabad city was in dilapidated condition and local authorities had issued warnings for its evacuation.
"There were seven casualties, including two women and a child," senior police official, Sarfaraz Bhutto said.
"The injured also include women and children and have been rushed to hospital for treatment," he said.
"The entire building has collapsed and it was a residential compound but few families were residing in it," one official said.