The death toll in the incident of explosion at a cracker making unit at Azhagapuri near Tirumayam has risen to four, with two more persons succumbing to their burns at the hospital.
Police said that two persons R. Arumugam (45) and A. Saravanan (32) who sustained serious burns were admitted to the private hospital in Madurai and Ponnamaravathy respectively. They both succumbed to the burns on Wednesday night, police said.
Two persons were killed on the spot when the explosives went off at the country cracker unit on Monday last.
In the meanwhile, the police have arrested the unit owner Sundaram on Wednesday.