One of the two people injured in a fire at the Chevron Phillips refinery in Port Arthur is recovering at a Houston hospital.

A company official said the fire broke out around 8 p.m. Monday.

Port Arthur Police Chief Mark Blanton said the two workers suffered injuries in what appeared to be a flash fire. Authorities said a medical helicopter took one of them to Memorial Hermann Hospital.

Company officials have released a statement confirming the fire, but have yet to determine a cause. Chevron Phillips said the situation at the plant does not pose a danger to any residents in the area.

Officials say an investigation team is on site looking to determine the cause of the fire. The plant has no timeline to re-open, according to authorities.