ARLINGTON, Texas (AP) _ An Amtrak passenger train carrying 199 people derailed Sunday night, slightly injuring more than a dozen passengers.

Eight passenger cars and one baggage car of the westbound train left the tracks shortly after 7 p.m., said Arlington fire Lt. Pat English. He said 13 people were taken to hospitals.

``It's generalized mostly as neck and back pain,'' English said. ``Nothing life-threatening, it appears, at this time. So we're really thankful it wasn't worse.''

The train, The Texas Eagle, originated in Chicago and was headed for Los Angeles. English said.

English said officials had not yet discovered what caused the derailment.

Amtrak spokesman John Wolf in Washington said the crash was under investigation.

The derailment occurred in an area just south of the Six Flags over Texas amusement park in this North Texas city between Dallas and Fort Worth.

TV station KDFW reported that the train apparently was involved in another accident in a neighborhood southeast of Dallas earlier Sunday. A woman walking on the tracks was struck and killed, KDFW reported.