He said the explosion was so loud that it was heard up to 5 km away.
After the explosion, pieces of iron and stones were seen scattered far and wide, the Collector said.
Kolte said that the blast took place in the LTP (Long Term Planning) section of the factory located in Jawahar Nagar area.
The exact cause of the explosion is yet to be ascertained, but authorities are conducting further investigations. Rescue and medical teams have been deployed at the blast site. The search is still on for the workers trapped inside.