Employees at the transfer station in Marion discovered three devices around 1 p.m. Tuesday.
Authorities were called to the scene, including the State Bureau of Investigation Bomb Unit.
Employees who monitor the trash that residents drop off noticed the grenades. “They just picked them up and brought them to me and said ‘Here you go,’” said Public Works Director Mike Gladden.
Officials said three hand grenades were found and could be WWII relics.
McDowell County Sheriff Dudley Greene said the explosives were taken to the sheriff’s office gun range and destroyed.
“It’s one of those situations that if someone has something like that they need to get in contact with their local law enforcement agency or someone like the SBI where those items could be collected and disposed of safely,” said Greene.
Authorities searched a tractor-trailer for more explosives. There is no word on if they found any.
Investigators are trying to figure out who dumped the explosives.