A migrant worker was killed, and four others sustained severe burn injuries after a boiler exploded at a steel melting unit in the SIPCOT Industrial Estate at Gummidipoondi in Tiruvallur district on Tuesday, triggering a major fire and prompting a large-scale emergency response.  

The deceased was identified as Ravi, a worker from a northern state, who died on the spot when the boiler exploded during working hours.