Deputy General Manager (Production) of Hetero Drugs, Nakkapalli, G. Srinivas Reddy was arrested on Friday in connection with the blast which occurred at the plant on Jan. 5, this year.

It may be recalled that two workers died at the plant and two others succumbed to their injuries at the hospital. The unit at Nakkapalli, located around 100 km from city, manufactures active pharmaceutical ingredients (API) and finished dosages. It had proposed to expand the unit. During the magisterial inquiry conducted by the Joint Collector it was established that the plastic pipes were used for pumping the chemicals instead of metal pipes. It was also said that sub-standard pipes were used.

It was established during inquiry that lack of supervision, inadequate safety precautions resulted in the blast.