Authorities are searching for a white Chevrolet Cavalier with the Texas license plate BV8205.
The children were last seen with Clifford King, 41, and Cristal Taylor, 27.
The children are believed to be in grave or immediate danger. If you have any information regarding this abduction, call the Hill County Sheriff's Office at 254-582-5313 or 911.
Stay with Eyewitness News for more information in this case as it becomes available.