A Sherman woman was killed Thursday when the vehicle she was driving on State Highway 289 collided with a loose trailer which detached from an oncoming pickup.

Texas Department of Public Safety Staff Sgt. Mark Tackett said the fatal wreck occurred half a mile south of Pottsboro shortly before 6 p.m. Tackett said Alma Sanchez, 20, was traveling south in her Nissan sedan when a bumper-pull trailer separated from a northbound Chevy pickup, drifted into her lane and struck her vehicle.

“Ms. Sanchez was pronounced dead at the scene,” Tackett said.

Sanchez was traveling alone in her car and the driver of the pickup was not injured. No other vehicles were involved in the wreck. Tackett said it would be some time before investigators were able to determine how the trailer became loose and whether the driver would face any charges.

“It’s currently under investigation,” Tackett said.