SAO PAULO (AP) Brazil's state-controlled Petrobras oil company says six workers have been injured in a fire at a refinery in the state of Sao Paulo.

Petrobras says in a statement it is investigating what caused Thursday's fire at the Henrique Lage refinery in the city of Sao Jose Campos. It is Brazil's third largest refinery, with a capacity to refine 250,000 barrels of oil per day.

It says the fire was quickly extinguished and that the refinery is operating normally.

Two of the injured were listed in serious but stable condition.