May 20, 2013 6:41 PM by Associated Press
MOORE, Okla. (AP) - The National Weather Service says the tornado that hit Moore, Okla., had wind speeds up to 200 mph.
The weather service's preliminary classification of Monday afternoon's tornado was an EF-4 on the enhanced Fujita scale.
Authorities say emergency crews are working to rescue people trapped in Moore, which is southwest of Oklahoma City.
Oklahoma City Police Capt. Dexter Nelson said emergency crews are trying to reach the affected areas. There were no immediate reports of injuries.
The suburb of Moore was hit hard by a tornado in 1999. The storm had the highest winds ever recorded near the earth's surface.
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