6 people have been rescued and search is on for others who are feared trapped under the debris.
Three of the injured have been taken to hospital, none of them are critical.
Fire fighters and police personnel have reached the spot.
The building was vacant but some people were living on the ground floor.
The building collapsed on a slum adjoining to it.
Police believe most of the injured are slum dwellers.
The injured have been admitted to V N Desai hospital.