Muzaffarnagar (UP): Four people died and 10 were injured in an explosion at a factory manufacturing firecrackers illegally in Shamli district on Friday evening, police said.
The explosion took place at a pickle factory in Kairana town, and some of the injured people are in critical condition, they added.
The police said a rescue operation is underway, and four bodies have been recovered so far.
Senior police and administration officials are at the spot, they said.
