Tornadoes kill 3 in central U.S.; new storms possible

Strong storms with tornadoes that plowed across the central U.S. killed at least three people in Oklahoma and left thousands without power Thursday as forecasters warned of potentially more severe weather to come. Authorities were still unsure of the full scale of injuries and destruction in Oklahoma, where storms flattened homes and turned over 18-wheelers. Employees of a pizza restaurant said they took shelter in the walk-in freezer, and when they emerged, portions of the roof and shattered wi