Mass shootings kill 29 in Texas, Ohio over weekend

Texas Governor Greg Abbott, who arrived at El Paso on Saturday evening, issued a statement calling the attack "a heinous and senseless act of violence".

He said troopers, special agents, Texas Rangers, tactical teams and aircraft have been deployed to the scene to assist in the investigation.

Saturday's mass shooting comes days after three shootings in Mississippi, New York and California caused multiple deaths.

In Southaven, Mississippi, two people were shot dead in a Walmart store on July 31; in California, three people were killed and 12 wounded at the Gilroy Garlic Festival on July 28; in Brownsville, in the New York City borough of Brooklyn, one man was killed and 11 injured when two gunmen opened fire at a block party on July 27.