At least 1 suspect in custody after 22 killed during shooting at a Walmart store in El Paso, Texas, US

A mass shooting occurred at a Walmart store in El Paso, Texas, United States, on the morning of August 3, 2019.

A single gunman killed 22 people and injured 24 more.

The Federal Bureau of Investigation (FBI) is investigating the shooting as an act of domestic terrorism and a possible hate crime.

Patrick Wood Crusius, age 21, was arrested shortly after the shooting began and charged with capital murder.

Police believe that the suspect published a white nationalist, anti-immigrant manifesto online immediately before the attack; the post cites inspiration from the Christchurch mosque shootings and refers to the white genocide conspiracy theory.

With 22 fatalities, it was the third-deadliest mass shooting in Texas history, and the seventh-deadliest in modern U.S. history. It was also the deadliest mass shooting in the United States in 2019, and the deadliest in Texas since the Sutherland Springs church shooting on November 5, 2017.

The incident took place at a Walmart Supercenter near the Cielo Vista Mall on the east side of El Paso. The single shooter walked into the store carrying what is believed to be a WASR-10rifle, a semi-automatic civilian version of the AK-47, and opened fire just before 10:40 a.m.

An eyewitness claimed that the shooter was firing on customers in the parking lot before he entered the building. Many eyewitnesses told reporters that they originally believed the gunfire to be roof construction or fireworks, before being alerted by other customers or employees.

Calls to 9-1-1 were placed and first responders began to arrive within six minutes of the initial call. The FBI's El Paso field office and the Dallas Field Division of the Bureau of Alcohol, Tobacco, Firearms and Explosives responded to the scene along with the Texas Department of Public Safety.

Other first responders were off-duty police officers. The shooter was taken into custody without incident, with the El Paso police chief reporting that no officers fired their weapons on the scene