Five people have been killed in the tornado outbreak in the Oklahoma City suburbs, according to the Oklahoma medical examiner's office.
Over 100,000 people are reportedly without power in their homes after the storm caused destruction on a large scale.
Two of the deaths occurred in Union City and one was in El Reno, west of Oklahoma City, according to Reuters.
It has not yet been confirmed where the other two deaths occurred.
More top news
A hacker group who claimed to be behind a cyber attack on Sony Pictures have posted a message online apparently mocking the FBI.
The returns of Benedict Cumberbatch's detective and the X Factor judge were among 2014's most tweeted TV moments in a billion conversations.
A family has issued an appeal to help find their missing pet turkey - in case he gets gobbled up as someone's Christmas dinner.