PRAYAGRAJ, March 25 -- In a coordinated late-night operation, police arrested Ansar Ahmed, the owner of the cold storage facility in Prayagraj that collapsed on Monday-killing four workers and injuring 14 others-along with his son Manzoor, and his nephew Alauddin. They were produced before a court on Tuesday and subsequently sent to jail, police said.

Meanwhile, according to a complaint filed by SSI Kambod Singh, the cause of the incident has been attributed to the explosion of an ammonia gas chamber.

Based on a written complaint filed late Monday night by SSI Singh, an FIR was registered against 12 individuals-including seven named accused: the cold storage facility's owner and former Samajwadi Party MLA Ansar Ahmed, manager Usman, Man...