A live grenade was found at a Wyandanch recycling plant Saturday morning, prompting Suffolk County police to evacuate the facility before safely detonating it.

Police responded to the plant at 7:50 a.m., clearing Omni Recycling of Babylon Inc. on Alder Street after the grenade was found by an employee, police said.

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The manager of the plant, Brian Nohs, 60, of Copiague, said he was “shaken, but OK.”

“Nothing that scary has ever been found here before,” Nohs said. “It’s amazing how stupid people can be in what they throw away. It could have easily killed 10, 15 people. I’m just glad everyone is OK.”

Nohs said he called the police immediately after the grenade was found. Police then safely detonated the bomb, Nohs said.

About 10 to 15 employees work in the area where the grenade was found, Nohs said. On a typical Saturday, Nohs said, about 200 to 300 vehicles can pass in and out of the plant, but he added that he had no idea where the grenade could have come from or who left it.

Police are investigating the origin of the grenade.