Updated Aug. 4, 9:20 a.m.
Police in Dayton, in the midwestern U.S. state of Ohio, say a gunman has killed nine people and wounded dozens of others.
Dayton police said Sunday on its Twitter account: "We had officers in the immediate vicinity when this shooting began and were able to respond and put an end to it quickly."
Police say the gunman, whose identity has not been released, is dead. The Associated Press quoted Dayton Mayor Nan Whaley saying he had been wearing body armor and carrying extra magazines for his weapon.
Police say the FBI is assisting in the case.
The shooting in the Oregon entertainment district of the city came just hours after another mass shooting Saturday at a Walmart in El Paso, Texas, where 20 people were killed and 26 were wounded. Last Sunday a gunman shot and killed three people at the Gilroy Garlic Festival in California.