A monorail operator was killed Sunday when it crashed into another monorail in the Magic Kingdom section of Walt Disney World in Florida.

Washington Post reports that the operators death was confirmed by Bo Jones, the deputy chief for Reedy Creek Fire Department. Fortunately, the operator of the other crashed monorail left uninjured but was brought to the hospital due to shock.

The cause of the crash is still unknown and the Orange County Sheriff’s officials are investigating.

Mike Griffin, Walt Disney World vice president of public affairs offered condolenses to the grieving families.