Indore, Dec. 30 -- A massive fire broke out at a three-storey chocolate factory in Madhya Pradesh's Indore district on Tuesday, leading to an explosion and the collapse of the factory building, an official said.

Four firefighters also sustained some injuries due to the collapse of the factory building situated in the Lasudia locality in the district. The fire incident occurred at around 12 noon while work was underway at the factory.

Initially, factory labourers tried to control the fire, but when they failed, they informed the fire brigade team about the incident.

Fire Brigade Sub-Inspector Sushil Kumar Dubey told ANI, "It was a three-storey chocolate factory located in the Lasudia police station area, and we were extinguishing a fire...