Following several mishaps in Virudhunagar district including an explosion that killed two persons on July 3 in Sivakasi where crackers were stored illegally, four teams comprising officials from police, revenue and fire services were set up and raids were conducted in Virudhunagar, Aruppukottai, Sivakasi and Sattur, a police official said.
"So far 21 cases have been booked and 13 arrested for unlicensed possession of chemicals and some quantity of crackers," S Maheswaran, Superintendent of Police, Virudhunagar, told PTI.
Also, the Petroleum and Explosive Safety Organisation of the Union government has also been conducting checks, he added.