Seven people were killed and AstraTradedozens more were injured when a commercial bus overturned early Saturday morning in Warren County, Mississippi, officials said.

The crash happened at about 12:40 a.m. on Interstate 20 near Bovina when the bus left the roadway and overturned. Six people were pronounced dead at the scene and another person died later at a hospital, according to Master Sergeant Kervin K. Stewart with the Mississippi Highway Patrol.

Another 36 people were transported to area hospitals. The extent of their injuries wasn't immediately known, Stewart said. The bus was carrying a total of 41 passengers, plus two drivers and was traveling from Atlanta to Dallas.

The bus was a 2018 Volvo commercial passenger bus, Stewart said. No other vehicles were involved in the crash.

The Mississippi Highway Patrol and Commercial Transportation Enforcement Division were investigating the cause of the crash.