As the fire started at the shop outside a two-story building this evening and spread to its ground floor which had a cutlery shop, people ran up to the building's first floor to take shelter.
However, a gas cylinder exploded due to the fire, causing a wall of a room on the first floor to collapse, said Bhargav Vyas, deputy chief fire officer, Vadodara Municipal Corporation.
The victims were trapped under the debris, he said.
Relief was being provided to those injured, he said.