A custodian at Downtown Disney in Orlando got a shock when they discovered three hand grenades in a trash can.

MyFoxOrlando.com reports the three grenades were hollowed out and posed no threat to the theme park. Authorities say they were removed and transported to a secondary location.

Jeff Williamson with the Orange County Sheriff's Office tells MyFoxOrlando.com authorities believe the grenades were used for some sort of training.

He says officials are investigating how the grenades ended up in the trash.

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