A fire broke out in a 21-storey building at Barqat Ali naka, Wadala East late on Thursday night injuring around 20 of its residents. A heavily-pregnant woman was among the injured rushed to KEM hospital, her relative and a 17th-floor resident, Purnima Chavan told mid-day.

Residents alleged that the building's three lifts are frequently overloaded with 10 flats on each floor. This could have led to a short circuit, they said. The building is well equipped with fire extinguishers on each floor. However, the residents did not know how to use them. The fire led to electricity supply being cut off, soon after which residents began to feel suffocated due to the flames and smoke. The building has 210 flats and all the residents have been asked to vacate their houses temporarily.