[UPDATE 1:30pm]: The Associated Press is reporting that a mile-long oil sheen is spreading from the platform that exploded this morning.
Another oil rig — owned by a Houston-based company — has exploded in the Gulf of Mexico.
According to early reports, the rig exploded 80 miles off the Louisiana coast. WAFB in Baton Rouge reports that the 13 workers are accounted for, after the rig exploded between 9:30 and 10:30am this morning. A Coast Guard rescue is underway.
According to Bloomberg and other reports, the rig belonged to Mariner Energy — which bills itself on its website as "one of the leading independent oil and gas exploration and production companies in the Gulf of Mexico."