MALDEN, MASS. (WHDH) - The Malden Fire Department was evacuated Thursday morning after a man with a grenade in hand walked into the building.

Officials tell 7News that a man who lives in the neighborhood brought what appeared to be a live grenade into the headquarters and placed it on a desk.

The man told firefighters that he had the grenade from WWII and that he wanted to hand it over to authorities.

The building was immediately evacuated and firefighters called in a state police bomb squad.

After about 30 minutes, crews determined the grenade was not live. Firefighters have since been allowed back into the building.

The incident is under investigation.

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