A worker at a state park was tied up and robbed early Monday morning.

It happened at Natural Bridge State Park in Slade. That's in Powell County.

Police say two men pulled guns on the night attendant and tied and taped him up. Police say one of the suspects had a ski mask on. The other had a bag over his head.

Investigators say the worker was tied for about an hour and a half before three guests at the Hemlock Lodge found him.

State Police detectives are investigating.

The worker was not seriously hurt.