A collision occurred outside of Duncanville early Thursday morning, shutting down all southbound main lanes on U.S. Highway 67 near Dallas Executive Airport.

According to the Texas Department of Transportation, the crash occurred near Hampton Road at 2:46 a.m. and is expected to clear by 9 a.m. Cameras show emergency services on scene. Travel is discouraged. The HOV lane remains open, and the exit at Pentagon Parkway is the last alternate route option before joining the 5 mph or less traffic, according to TxDOT traffic cameras.

Duncanville Police Department and the Dallas County Sheriff’s Office did not immediately respond for comment.

This is a developing story and will be updated.