MADURAI: The death toll in the firecracker unit blast near Sattur in Virudhunagar district rose to 21 on Friday morning.
P Mala, 30, of Pandhal village near Sattur, who was undergoing treatment in the burns ward of the Government Rajaji Hospital (GRH) in Madurai, died at 7am on Friday.
The blast happened at Sri Mariammal Fireworks at near Achankulam on February 12, killing nine people on the spot and injuring 43 others. The death toll climbed to 17 the same night and 19 the next morning. Another injured man died in GRH on February 14.
The Elayirampannai police have arrested four people in connection with the incident and are on the lookout for three others.