A bus carrying paintball players struck and killed a man inside a zombie attraction at a corn maze in Idaho, authorities said.

Jeremy T McSpadden Jr, 18, of Spokane Valley, Washington state, was a role player in the Zombie Slayer Paintball Bus attraction at the Incredible Corn Maze in Hauser on Friday night, the Kootenai County sheriff's office said.

The attraction is new this season, according to the corn maze's website. For $15, customers ride in the bus and shoot paintballs at the zombies as the vehicle drives through the corn maze.

It is not clear why the bus hit Mr McSpadden, who died at the scene.

The bus was going forward, and neither speed nor alcohol was a factor, Sgt Ward Crawford said.

"The focus of the attraction is the bus creeps forward so the customers have plenty of opportunity to blast away at the zombies," Sgt Crawford said. "This looks like it was just a horrific confluence of events."