Two More People Tragically Die After Shopping Centre Massacre

The death toll rose in a mass shooting at a Walmart store in El Paso, Texas, has risen to 22 with two deaths in hospital.

Texas prosecutors charged a man with capital murder for the massacre in the heavily Hispanic border city that initially claimed 20 lives.

Two victims died in the hospital on Monday morning, raising the grim total rose to 22, El Paso Police said on Twitter.

El Paso Mass Shooting
22 people have now been confirmed dead. Photo: Getty Images.

READ MORE: At Least 20 Dead, Dozens Injured In Supermarket Mass Shooting

Texas Governor Greg Abbott said Saturday's rampage appeared to be a hate crime and federal prosecutors called it domestic terrorism.

Police cited a racist, anti-immigrant manifesto posted online shortly before the shooting, which they attributed to the suspect, Patrick Crusius, as evidence that the bloodshed was racially motivated.

A Texas prosecutor said the state will seek the death penalty against Crusius if he is found guilty.

READ MORE: Prosecutors To Seek Death Penalty For Alleged Shopping Centre Shooter

Patrick Crusius is the key suspect in the mass shooting. Photo: CBS News.

State prosecutors have charged Crusius, a 21-year-old white man, with capital murder, according to the County of El Paso's state court website.

The single murder charge is likely a legal place holder to keep Crusius in custody until further charges can be filed for each of the dead and the wounded.

His grandparents, with whom Crusius had recently been living, said they were devastated by the attack.

"He lived with us in our house in Allen, Texas, while he attended Collin College," the statement said, read aloud by a family friend to reporters outside the home on Sunday.

"He moved out of our house six weeks ago, and has spent a few nights here while we were out of town."

The suspect lived with his grandparents in their Texas home. Photo: Twitter/Piers Morgan.

The Federal Bureau of Investigation said in a statement on Sunday the attack "underscores the continued threat posed by domestic violent extremists and perpetrators of hate crimes".

The agency said it remains concerned that more US-based extremists could become inspired by these and previous high-profile attacks to engage in similar acts of violence.

The US attorney for the western district of Texas, John Bash, said federal authorities were treating the El Paso massacre as a case of domestic terrorism.

He said the attack appeared "to be designed to intimidate a civilian population, to say the least."

Two more people have been confirmed dead after the mass shooting. Photo: Reuters.

FBI Director Christopher Wray told a congressional panel on July 23 that the bureau has recorded about 100 arrests of domestic terrorism suspects in the preceding nine months and that most investigations of that kind involve some form of white supremacy.

Crusius comes from Allen, a Dallas suburb about 1046km east of El Paso, which lies along the Rio Grande across the US-Mexico border from Ciudad Juarez.

A four-page statement posted on 8chan, an online message board often used by extremists and believed to have been written by the suspect, called the Walmart attack "a response to the Hispanic invasion of Texas".

It also expressed support for the gunman who killed 51 people at two mosques in Christchurch, New Zealand, in March.