Four workers sustained injuried in a blast triggered by a fire at a namkeen factory in southwest Delhi's Najafgarh on Saturday morning, the officials said.
A call regarding the fire was received at 8:16 AM and 17 fire tenders were pressed into service, the Delhi Fire Services (DFS) official said.
The fire broke out on the ground floor of the two-storey building.
Four workers who were inside the factory were injured in a blast that was triggered by the fire. They were taken to Deen Dayal Upadhyay Hospital, he added.
According to the officials, efforts to douse the fire are underway.
Further details awaited.