Two girls struck and killed by an Amtrak train were playing a deadly game.

The accident happened early Tuesday at a railroad crossing near Poplar Bluff in southeast Missouri. The Missouri State Highway Patrol says the victims were 15-year-old Victoria Swanson and 17-year-old Haley Whitmer, both of Poplar Bluff. A third girl is in serious condition.

Butler County Coroner Jim Akers says the teens were playing a game called "Ghost Train," in which a car is parked on the tracks purportedly awaiting a "ghost train" that wrecked many years ago. Occupants let the windows fog up in the scary setting. If a real train approaches, they drive off.

But Akers said the Jeep wouldn't restart. Relatives told Akers the girls had played the game many times before.