The incident took place inside Saanvi Laboratories located at industrial area of Bontapalli village under Jinnaram police station limits when a group of workers were working and a reactor exploded at around 1:00 AM, Narsapur Police Station Circle inspector Tirupati Raju said.
The deceased worker has been identified as Ahmed Laskur (20). The five injured were rushed to a nearby hospital from where they were later shifted to a hospital in Hyderabad.
The condition of two workers was stated to be critical.