Horse killed on eastbound I-10 in Buckeye

12/5/13- A horse was killed when a tractor-trailer rig and a truck pulling a horse trailer collided during an accident that had six horses running loose on Interstate 10 in Buckeye early Thursday morning.

Department of Public Safety officers rounded up the other five horses. It's not immediately clear how the sixth horse died.

The horses were being taken to the Turf Paradise racetrack in north Phoenix.

Neither driver was injured.