At least one person is reported dead and several others injured in a series of tornadoes that have torn through the US state of Oklahoma.
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Storm-chasers have captured footage showing tornadoes touching down in both Texas and Kansas.
Up to 60 people were injured when a car ploughed into a crowd during a parade in a small town in the US state of Virginia, officials say.
More than 60 people were injured, at least two critically, after a head-on collision between two commuter trains near New York, officials say.