MIAMI – A Walt Disney World employee died on Sunday in a collision of monorail trains carrying tourists at the theme-park complex in central Florida, according to a theme park spokeswoman.

The futuristic elevated trains collided near the entrance to the sprawling resort’s Magic Kingdom park around 2 a.m. Eastern time, according to spokeswoman Zoraya Suarez.

Details of injuries were not immediately available, she said, though local media reported no tourists were seriously injured. The cause of the crash was being investigated, according to local police.

Disney World, a unit of the Walt Disney Co, has closed the monorail system used to carry tourists to parks and hotels, but otherwise was operating normally, according to Suarez and Mike Griffin, a vice president at the resort.