UPDATE: OSHA investigating Lavaca County oil rig explosion

The scene of the rig fire off of Highway 111.

The Occupational Safety and Health Administration is investigating an oil rig explosion that continues to burn in Lavaca County on Thursday.

OSHA also does not have an inspection history of the Nabors rig F38 during the past 10 years, said Diana Petterson, regional director for the U.S. Department of Labor.

The explosion, which happened before 7 p.m. Wednesday, is still burning and will continue.

"It is still burning, but is has been contained," K Leonard, manager of public relations for EOG Resources of Houston, the rig operator, said.

The Nabors oil rig exploded about 7 p.m. Wednesday in Petersville off state Highway 111.

Wild Well Control of Houston is leading the fire suppression efforts. EOG is assembling well control experts and specialized equipment to safely control the well and extinguish the fire.

"It is too early to determine the cause of the incident," she said.

All workers were accounted for after the explosion, and no injuries were reported.

Area fire departments, including from Yoakum and Shiner, responded to the blaze.