Oklahoma state police said three people were shot dead in an attack at a Walmart store, in the latest such incident in the United States.
A spokeswoman at the Luton Highway Patrol office confirmed three people had been killed. There were no further details about the attacker, and it was not clear if more casualties were reported
Police sources said the attacker was killed. A Duncan Police spokeswoman confirmed the shooting but did not provide further details.
The accident follows a similar shooting in Fresno, California that saw at least four people killed during a match gathering.