Crews managed to extinguish a massive blaze on a rig in the Gulf of Mexico Thursday and have not been able to locate an oil slick spotted earlier in the day, the Coast Guard said.
"The fire is out, and Coast Guard helicopters on scene and vessels on scene have no reports of a visible sheen in the water," Captain Peter Troedsson, chief of staff for the Eighth Coast Guard District, told reporters.
"There's no report or an evidence of leaks, but we continue to investigate and to monitor that situation to make sure that that doesn't change."
Fire engulfed the offshore platform 90 miles (145 kilometers) south of the Louisiana coast shortly after 9:00 am (1400 GMT) and massive plumes of grey smoke billowed into the sky as rescuers rushed to fish out the workers.
Workers told rescue crews that they managed to shut down the wells before evacuating the platform and had spotted a thin sheen of oil spreading for about a mile.