Thousands of people have been left without power in their homes following a second tornado to hit Oklahoma in the space of two weeks.
Around 50 people were injured in the storm, according to the Associated Press.
More top news
Civil rights leaders called for a probe into claims a southern school took no action against students over an alleged "racial hate crime".
A teenager dressed as a "killer clown" and brandishing a hammer has been stabbed after attempting to scare a group of young people.
Researchers in the US claim they have discovered the answer to the mystery of the Bermuda Triangle.