A community whose high school was destroyed the day before graduation by a tornado that killed seven people, including the valedictorian's father, rescheduled the ceremony as residents sifted through houses in many cases reduced to rubble.

A tornado that killed seven people south of Toledo was one of a string of tornadoes that struck across northern Ohio over the weekend.

The National Weather Service says three others have been confirmed, all less severe than the deadly tornado. No injuries were reported in the others.