Homes were evacuated and a road shut down in Genesee County Monday morning after a police officer found a live grenade in the trunk of a car in LeRoy. YNN's Kaitlyn Lionti tells us more about what happened after the driver was stopped for speeding.

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LEROY, N.Y. -- It's something police officers do on a regular basis, but when a car was pulled over for speeding Monday morning in LeRoy, an officer found something unexpected.

"The officer discovered a grenade in the trunk of the car," said Chris Hayward, chief of LeRoy Police.

Hayward says the driver, a Buffalo-area man in his 30s, gave the officer permission to search the trunk and said he made the grenade.

"He confirmed to the officer that it was in fact live and that there was, you know, all the components there that it would actually work. He's indicated he's done it before," said Hayward.

Lake Street was temporarily closed to traffic, the fire department was put on standby and about 12 people were evacuated from homes the area. The State Police Bomb Disposal Unit was called in to remove the grenade.

"It actually looked like a real grenade. It was all the components to what you'd see in the service, service grenade," said Hayward.

Police say they also found what looked like a semi-automatic weapon in the car.

The driver was taken into custody and police say he'll likely face weapons charges.