A one vehicle rollover accident occurred Wednesday morning at approximately 8:38am in Seward County. The accident happened 15.3 miles northeast of Liberal on US Highway 54 when a 2004 Ford F150 being driven by Maria Ontiveros, 36, of Hugoton was heading east on US 54 and for an unknown  reason lost control of the vehicle. The pickup  then entered the center median  causing the truck to roll over 1 and a half times, coming to rest on the driver’s side of the vehicle facing southwest. Ontiveros was taken to Southwest Medical Center in Liberal to be treated for her injuries.