Six persons were injured after an explosion in a boiler in a factory in Asoj on Halol Road on Monday evening.
All the injured persons were admitted to a hospital in the city and the condition of three is reported to be critical.
Sources said that blast occurred in one of the boilers in a construction and project management firm. Six staffers on the premises suffered burns.
While five of them were referred to the government hospital they were later shifted to a private hospital. The reasons behind the blast is yet to be ascertained.