Mumbai: At least four are dead, over 13 injured after after a three-storeyed residential building collapsed near J.J. Hospital in south Mumbai's Dongri area on Thursday morning.

As many as 25-30 people are still feared to be trapped under the debris.The NDFR team, ambulance, fire brigade have arrived at the site to look out for the survivors.

More than two dozen people were living in the old and dilapidated Arsiwala building on Maulana Shaukat Ali Road. Rescue efforts have been launched, according to eye-witnesses.

The cause of the building crash is not yet known.

This is the first major building collapse after Tuesday's Mumbai deluge, and the second in five days after the Chandivali crash which claimed six lives.