WATCH LIVE: Trump to address the nation after mass shootings leave 29 dead

US President Donald Trump will address the nation on Monday after two shootings left 29 people dead and sparked accusations that his rhetoric was part of the problem.

The rampages turned innocent snippets of everyday life into nightmares of bloodshed: 20 people were shot dead while shopping at a crowded Walmart in El Paso, Texas on Saturday morning, and nine more outside a bar in a popular nightlife district in Dayton, Ohio just 13 hours later.

Trump will again find himself in the role of consoler-in-chief after a tragedy -- which he has struggled with in the past -- when he speaks at 10:00 am (1400 GMT).

Following the shootings, Trump said "hate has no place in our country," but he also blamed mental illness for the violence.

"These are really people that are very, very seriously mentally ill," he said, despite the fact that police have not confirmed this to be the case.

"We have to get it stopped. This has been going on for years... and years in our country," he said.

In Texas, 26 people were wounded, and 27 in Ohio, where the shooter was killed in roughly 30 seconds by police who were patrolling nearby.

- 100-round drum magazine -

Dayton Police Chief Richard Biehl told a news conference that the quick police response was "crucial," preventing the shooter from entering a bar where "there would have been... catastrophic injury and loss of life."

Biehl said the shooter wore a mask and a bullet-proof vest and was armed with an assault rifle fitted with a 100-round drum magazine.

Police named the gunman as a 24-year-old white man called Connor Betts and said his sister was among those killed. She had gone with him to the scene of the shootings.

Six of the nine people shot dead were black, but Biehl said Betts' motive was still unclear.

In Texas, police said the suspect surrendered on a sidewalk near the scene of the massacre. He was described in media reports as a 21-year-old white man named Patrick Crusius.

He was believed to have posted online a manifesto denouncing a "Hispanic invasion" of Texas. El Paso, on the border with Mexico, is majority Latino.

- 'Amplifying and condoning' hate -

Seven of the 20 people killed in the El Paso shooting were Mexican, the country's foreign minister, Marcelo Ebrard, said Sunday.

Ebrard, who will travel to El Paso Monday, said Mexico was looking at legal action which could lead to extradition of the gunman.

"For Mexico, this individual is a terrorist," he said.

The manifesto posted shortly before the shooting also praises the killing of 51 Muslims at two mosques in Christchurch, New Zealand in March.

Police said the suspected shooter has been charged with murder offenses that can carry the death penalty, and a federal official said investigators are treating the El Paso shooting as a case of domestic terrorism.

At the Walmart in El Paso, terrified shoppers cowered in aisles or ran out of the store as gunfire echoed.

Most of the victims were inside the store but some were also in the parking lot outside, police said.

"Shooting kids and women and men, to him it mostly mattered that they were Hispanic," said Manuel Sanchez, a resident of the city.

These were the 250th and 251st mass shootings this year in the US, according to the Gun Violence Archive, an NGO that defines a mass shooting as an incident in which at least four people are wounded or killed.

Despite a string of horrific mass shootings in the US, where gun culture is deep-rooted, efforts to strengthen firearms regulations remain divisive.

The latest two shootings ended a particularly tragic week for gun violence in America: three people died in a shooting at a food festival last Sunday in California, and two more Tuesday in a shooting in a Walmart in Mississippi.

On Twitter, Trump described the El Paso attack as "an act of cowardice."

But critics said the president's habit of speaking in derogatory terms about immigrants is pushing hatred of foreigners into the political mainstream and encouraging white supremacism.

"To pretend that his administration and the hateful rhetoric it spreads doesn't play a role in the kind of violence that we saw yesterday in El Paso is ignorant at best and irresponsible at worst," said the Southern Poverty Law Center, a major civil rights group.

It cited Trump actions like calling Mexican migrants rapists and drug dealers and doing nothing when a crowd at a Trump rally chanted "send her back" in reference to a Somali-born congresswoman.

The Republican mayor of El Paso, Dee Margo, seemed to discount any race element to the Texas shooting, telling Fox News the gunman was "deranged."

But multiple Democratic presidential hopefuls said Trump bears some of the blame for the violence.

"Our president isn't just failing to confront and disarm these domestic terrorists, he is amplifying and condoning their hate," Mayor Pete Buttigieg tweeted.

"Mr. President: stop your racist, hateful and anti-immigrant rhetoric. Your language creates a climate which emboldens violent extremists," Senator Bernie Sanders wrote on Twitter.