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Pictured are World War II-era grenades and shells found in a box at a home on Chelsea Drive in unincorporated San Jose on June 27, 2013.

SAN JOSE -- A bomb squad safely detonated a handful of World War II-era grenades discovered Thursday morning at a home in unincorporated San Jose, according to the Santa Clara County Sheriff's Office.

Bomb technicians were called about 10:30 a.m. to a home in the 15000 block of Chelsea Drive, near Union and Camden avenues, Deputy Kurtis Stenderup said. A caretaker of the home -- whose owner recently died -- was sifting through boxes when and found the grenades lying amid assorted shells, and called authorities.

Deputies evacuated surrounding homes and shut off the gas lines while the bomb squad took the grenades to the front yard, dug a hole and lined it with sandbags, and detonated them.

Stenderup said no one was injured and that the Sheriff's Office cleared the scene shortly after 2 p.m.