precluded him from purchasing the assault-style weapon, which had been modified since it was sold, the police chief said.

The rifle was fitted with an extended drum magazine that could hold 100 rounds. The gun was bought legally online from a dealer in Texas and shipped to a local firearms dealer, police said.

Betts' sister Megan Betts, 22, was one of the first to be killed. Biehl said the siblings had arrived in the same vehicle with a third person earlier in the evening but separated before the rampage.

The companion was wounded in the shooting, police said.

The shooting in Dayton, a riverfront city of about 140,000 people in southwestern Ohio, took place just 13 hours after a mass shooting at a Walmart store in El Paso, Texas, where 20 peoplewere killed and 26 others wounded. The 21-year-old suspect in that shooting was arrested.

"Nightmare" For Parents

U.S. President Donald Trump addressed the spate of shooting sprees from the White House on Monday and called Betts a "twisted monster." He said law enforcement must do more to spot the "early warning signs" of would-be mass murderer.

The two mass shootings reverberated across the U.S. political arena with some Democratic presidential candidates accusing Trump, a Republican, of stoking racial divisions. Trump said on Sunday that "hate has no place in our country."

Those killed in Dayton were four women and five men and ranged in age from 22 to 57, authorities said.

"There isn't much discrimination in the shooting," Assistant Police Chief Matt Carper told reporters. "It happened in a very short period of