The blast took place on Saturday evening during the testing of some chemicals at the under-construction plant of Ank Pharma in Kolwade village, killing six people
The blast, which took place during the testing of some chemicals around 7.20 pm, was so huge that it was heard within a 15-km radius
Local eyewitnesses said the explosion, "sounding like a huge bomb" took place when many people were preparing to retire for the night