(KMZA)--A Tuesday morning single-vehicle Pottawatomie County roll-over wreck claimed the life of an Oklahoma woman.

The Pottawatomie County Sheriff's Office, in a release, says the wreck was reported shortly after 8:00 on Highway 99 near North Church Road in rural Westmoreland.

Law enforcement, EMS and fire units responded and located a Pontiac Solstice on its roof in the west ditch.

The Sheriff's Office says deputies were able to determine that the vehicle had been southbound when the driver lost control. The vehicle overturned in the west ditch.

The driver, identified as 66-year-old Shirley Riegel, of Oklahoma, was transported to Topeka'S Stormont-Vail Hospital for the treatment of serious injuries.

The passenger, 74-year-old Oklahoma resident Marsa Candler, was also transported to the hospital where she later died.

The wreck remains under investigation.

Authorities both women are the sisters of Dana Chandler, who is on trial in Pottawatomie County for the July 2002 deaths of her ex-husband and his fiance.