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Photo: Chet Strange/Getty Images

The 21-year-old suspect in the Boulder massacre bought a Ruger AR-556 semiautomatic pistol less than a week before Monday's mass shooting, which killed 10 people, per an arrest affidavit released Tuesday.

Details: The suspect, identified by officials as Ahmad Al Aliwi Alissa, purchased the AR-556 pistol on March 16, according to the affidavit. It was not immediately clear whether it was the weapon used in Monday's shooting or where the gun was purchased. The affidavit states that police removed "a rifle (possible AR-15)" and a "semiautomatic handgun" from the scene.

  • King Soopers grocery store employees told investigators that the suspect shot an elderly man several times outside the store, according to the affidavit. Another person was found shot in a vehicle next to a car registered to a man authorities believe is the suspect's brother.
  • Witnesses continued to call 911 dispatch stating they heard shots inside the store. "Multiple people stated they were hiding in the store," the affidavit adds.
  • Alissa was from the Denver suburb of Arvada, according to the affidavit.
  • The suspect has been charged with 10 counts of murder in the first degree, police said in a Tuesday morning update.

The victims include: Denny Stong (20); Neven Stanisic (23); Rikki Olds (25); Tralona Bartkowiak (49); Suzanne Fountain (59); Teri Leiker (51); Kevin Mahoney (61); Lynn Murray (62); and Jody Waters (65). Boulder police officer Eric Talley, 51, who was first on the scene, was also killed.

The big picture: President Biden on Tuesday urged Congress to pass gun control legislation, including two House-approved bills to expand background checks and renewed bans on assault weapons and high-capacity magazines.

  • Monday's attack is the second massacre in the past week, after the Atlanta massage parlor shootings on March 16 that left eight people dead — including six Asian women.

Go deeper: Judge lifted Boulder assault weapons ban days before mass shooting

Go deeper

Naomi Osaka eliminated from Olympic tennis tournament in Tokyo

Czech 42nd-ranked Marketa Vondrousova (L) shakes hands with Japan's Naomi Osaka after their Tokyo 2020 Olympic Games women's singles third round tennis match at the Ariake Tennis Park in Tokyo on Tuesday. Photo: Giuseppe Cacace/AFP via Getty Images

Naomi Osaka was eliminated from the Olympics after losing her Tokyo tennis tournament match 6-1, 6-4 in the third round to Czech Marketa Vondrousova on Tuesday.

Of note: Japan's Osaka is the women's world No. 2, while is Vondrousova ranked No.42.

Drought pushes 2 major U.S. lakes to historic lows

Kayakers at a boat launch ramp Page, Arizona, on July 3, which was made unusable by record low water levels at Lake Powell as the drought continues to worsen near. Photo: David McNew/Getty Images

Two significant U.S. lakes, one of which is a major reservoir, are experiencing historic lows amid a drought that scientists have linked to climate change.

What's happening: Lake Powell, the second largest reservoir in the U.S., has fallen 3,554 feet in elevation, leaving the crucial reservoir on the Colorado River, at 33% capacity — the lowest since it was filled over half a century ago, new U.S. Bureau of Reclamation data shows.

Updated 2 hours ago - World

North and South Korea restart hotline and pledge to improve ties

South Korean President Moon Jae-in and North Korean leader Kim Jong Un in Pyongyang, North Korea, in 2018. Photo: Pyeongyang Press Corps/Pool/Getty Images

North and South Korea's leaders have pledged to improve relations and resume previously suspended communication channels between the two countries.

Why it matters: The resumption of the hotline on Tuesday comes despite stalled negotiations between Washington and Pyongyang on the denuclearization of North Korea, which broke down after a second summit between then-President Trump and North Korean leader Kim Jong-un ended without a deal in 2019.

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