A woman was killed and five people were injured Monday when a part of a building collapsed in Mumbai, an official said amid fears of many others still trapped under the debris.

"The victim has been identified as Amrita Shukla, 29. Five others have also sustained injuries and have been admitted to KEM Hospital," an official from civic disaster control room said.

According to eyewitnesses, the second floor of the building - named Victoria House and located on Elphinstone Road in central Mumbai - collapsed in the afternoon.

However, many people had been evacuated since 11am when a huge crack in the building was noticed.

Some people were still feared to be trapped under the debris even as rescue operations were on. It is yet to be ascertained as to how many people were present inside the building.