A fireworks display exploded during a festival at an Indian temple early Sunday, killing 100 people and more than 350 people were injured, according to CNN. The fire started at the Puttingal temple in Kerala state. Sparks from the display caused a magazine of fireworks to erupt, causing a bigger blaze, said K. Laljy, a local police official.

The worshipers were celebrating a local temple festival, according to P. Prakash, the Kollam police commissioner. It`s not uncommon for people to pray at temples early in the morning in southern India.

Rescue operations are underway, though it`s unclear whether anyone is still inside the temple.

Indian Prime Minister Narendra Modi said he plans to visit the site of the fire.