Update: No Sheen from Oil Explosion

COLUMBIA, S.C. (WOLO) – One day after an oil platform exploded off the Gulf Coast,the Coast Guard says patrols in the area are not  reporting any signs of leaks.

A helicopter is expected to survey the site in the Gulf of Mexico, later in the day.

The Coast Guard initially reported a sheen a mile long, but hours later it said crews were unable to find any spill.

13 workers on the platform were rescued, and there were no major injuries.

The owner of the rig, Mariner Energy of Houston, says it doesn’t know what caused the fire.