NEW DELHI, Aug. 22 (Xinhua) -- Three engineers were killed and a worker was critically injured in a massive fire that broke out following a powerful explosion inside a cement and steel plant in the eastern Indian state of Jharkhand, police said Saturday.
The incident took place late Friday in the Hehal area of Ramgarh district, about 55 km north of Ranchi, the capital city of Jharkhand.
Following the incident, police and fire brigade officials reached the site to contain the blaze and carry out rescue efforts.
Police have ordered an investigation to ascertain the exact cause of the blast and subsequent fire.
India's state-run broadcaster All India Radio (AIR), quoting preliminary information, said the plant's protection system failed due to excessive temperatures, causing the turbine to overspeed and resulting in the explosion. ■