A Tennessee woman died early Sunday morning after she was involved in a head-on wreck with a tractor-trailer in south Alabama, authorities said Monday.

Rachel S. Marcum, 51, of Mooresburg, Tennessee, was driving a 2012 Ford Focus around midnight Sunday on Highway 31 in Conecuh County when her car collided head-on with a 2019 International tractor-trailer, said Alabama Law Enforcement Agency Senior Trooper Joshua Thompson.

Marcus, who was not wearing a seat belt at the time of the crash, was pronounced dead at the scene of the wreck about three miles north of Castleberry.

Further information was unavailable as state troopers continued to investigate the wreck.