U.S. President Donald Trump railed against "monstrous evil" Monday after back-to-back mass shootings last weekend claimed 29 lives, and injured roughly 50 others.

Axar.az reports citing Anadolu Agency.

The president made particular mention of the need for stronger gun laws, but offered few concrete details. He did, however, condemn white supremacy after authorities linked one of the attacks to racial hatred.

"In one voice our nation must condemn racism, bigotry and white supremacy," Trump said from the White House in televised remarks. "These sinister ideologies must be defeated. Hate has no place in America. Hatred warps the mind, ravages the heart, and devours the soul.”

On Saturday in El Paso, Texas, a gunman opened fire in a Walmart retail store in what authorities are treating as a case of domestic terrorism. The suspect, 21-year-old Patrick Crusius, was taken into custody after 20 people were killed and 26 others were injured.

Just minutes before the tragedy a racist essay was posted to the online 8chan website titled, “The Inconvenient Truth,” tht railed against an alleged "Hispanic invasion of Texas,” and assails "race-mixing" while pledging an imminent attack.

“I am simply defending my country from cultural and ethnic replacement brought on by an invasion,” it said. "This is just the beginning of the fight for America and Europe. I am honored to head the fight to reclaim my country from destruction."

The Walmart shopping complex is located just minutes from the U.S.-Mexico border, and many of the victims were Latino, including seven Mexican nationals.

El Paso Police Chief Greg Allen said investigators are attributing the writing to Crusius.

About 13 hours after the tragedy unfolded another rocked Dayton, Ohio, when a body armor-clad gunman opened fire in a popular nightlife area.