ORLANDO, Fla. (AP) -- Emergency officials say two monorail trains crashed in the Magic Kingdom section of Walt Disney World, killing one train's operator.

Bo Jones, deputy chief for Reedy Creek Fire Department, says one train operator died at the scene of the crash, which happened around 2 a.m. Sunday. The other train operator was not injured, but was taken to a hospital because he was emotionally shaken. Five park guests were treated at the scene.

Jones says it is unclear what caused the crash. Orange County Sheriff's officials are investigating the cause.

Jones says the crash happened at the park's ticket and transportation center.

Walt Disney World vice president of public affairs Mike Griffin issued a statement offering condolences to the employee's family and saying the monorail was closed.