BOSTON -- Several explosives, including a grenade, were found Tuesday in the parking lot of the Attleboro Police Department.

The explosives, which included two small rockets and the grenade, are possibly of World War II vintage. Officials said that a man brought them to the station at about 3 p.m. He said that he found them in the home of a friend who died recently.

The police department and city hall were evacuated. The Massachusetts State Police bomb squad was called to the scene.

Investigators are treating the explosives as if they are live.

NewsCenter 5 and TheBostonChannel.com will have more information as it becomes available.