An intense fire at a Venezuelan refinery spread to a third fuel tank nearly three days after an explosion killed at least 41 people and injured more than 150.

A huge explosion rocked Venezuela’s biggest oil refinery and unleashed a ferocious fire, killing at least 39 people and injuring more than 80 others in one of the deadliest disasters ever to hit the country’s key oil industry.

Venezuelan president Hugo Chavez said that he plans to return home this week from Cuba and has been recovering smoothly after undergoing cancer surgery.