A cylinder blast and subsequent fire at the 100-year-old Sarabhai building in Lalbaug’s Ganesh Galli early on Sunday killed one person, and left 15 people injured, of whom nine are in a critical condition. A number of people, who were here to attend the owner’s daughter’s wedding, were staying in the room when the incident happened.

The fire spread to three adjacent rooms and even a wall collapsed. While MHADA officials have started repair work at the building, residents said they might file a police complaint against the owner as he was using the premises for his catering business for the past 10 years and had stored cylinders for commercial use.