The US Coast Guard is responding to a reported blaze on a rig in the Gulf of Mexico, a news report said.
The organisation told Reuters it had been contacted about the fire at 2:30am on Thursday.
It said the installation had caught fire about 80 miles south of Grand Isle, Louisiana.
Reuters cited coast guards as saying four people had been evacuated from the platform and that there had been no injuries.
The cause of the incident is being investigated.