Tornado in Cullman
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Tornado devastates southern states in the United States

President Barack Obama is to visit storm-ravaged communities in Alabama as south-eastern US states face up to the aftermath of devastating storms.

At least 297 people are known to have died from tornadoes that ripped through a swathe of states, 204 of those dead are in Alabama.

Amateur video caught a tornado sweeping through the city of Cullman.