Located in the US state of Texas, a suspect being arrested on remand, US authorities quoted by CBS News.
The preliminary balance is 19 dead and 40 injured, the US authorities said Saturday night through Sunday.
A 21-year-old suspect, identified as Patrick C., was placed in pre-trial detention. Initially, El Paso Mayor Dee Margo had announced the arrest of three suspects.
Police Sergeant Enrique Castillo assured that there was no imminent risk.
The armed attack took place at a Walmart mall in Cielo Vista Mall in El Paso, Fox News and CNN reported.
At the time of the attack, there were approximately 3,000 people in the mall, who were evacuated. According to witnesses, the attacker used an AK-47 weapon. Authorities are trying to find out the reason for the armed attack.
photo source: buffalonews.com