Valsad,Jan 12(Agencies): Seven persons including three fire officials, were injured on wednesday in a powerful blast, which was followed by a fire at a chemical factory in Vapi here,

The blast occurred following leakage in an installation vessel in the Arson Chemical factory at the industrial estate,

Valsad Superintendent of Police DB Vaghela told that all the injured,including three fire officials have been admitted to the government hospital and the condition of three
persons was reported to be critical.

The blast along with the fire has badly damaged a portion of the chemical factory building,
Fire officials and other forensic experts are examining the site, police said, adding a case has been registered and investigations are on.