A fire and explosions during a fireworks display to mark the start of the local Hindu new year killed 100 people and injured more than 380 at a temple in India's southern Kerala state.
Thousands of devotees had packed into the Puttingal Devi temple, about 7 km from the state capital Thiruvananthapuram to watch the display.
The blaze started when a cracker fell onto a shed where the fireworks were stored, sparking a string of powerful explosions that blew the roof of the administrative block of the temple and caused another building to collapse, residents said.
Kerala is studded with temples managed by rich and powerful trusts that often flout local regulations.
Each year temples hold fireworks displays, often competing to stage the most spectacular ones, with judges who decide the winners.
A local official said people living in the area near the temple had complained about the danger of these fireworks in the past.
Prime Minister Narendra Modi flew to Kollam with a team of doctors to help state authorities cope with the large number of injured, moving swiftly to head off criticism of a lack of public safety.
"The fire at the temple in Kollam is heart-rending and shocking beyond words," he said in a Twitter post. "My thoughts are with families of the deceased and prayers with the injured."
Mr Modi has faced public criticism in the past for failing to respond quickly to disasters such as the floods in Chennai late last year.
Large parts of the sprawling city were under water for days before government help arrived.
Earlier this month, a flyover under construction in the eastern city of Kolkata for years collapsed killing 27 people, prompting allegations that shoddy material was used and that the metal parts had corroded during the years of delay.
With Kerala in the midst of an election for a new state assembly, the fire quickly turned into a political issue as local leaders demanded an investigation.
Witnesses said they had repeatedly warned the local administration about the danger of firework displays in the crowded neighbourhood.
The explosion from the fireworks was so strong that some parts of the temple roof caved in.
Local media showed bulldozers trying to clear the area of the debris.
The Puttingal temple is one of the oldest in the state. It was built on the site of an ant hill where locals believe a goddess appeared centuries ago.
