A suspect is in police custody after an active-shooter situation Monday afternoon at a grocery store in Boulder, Colorado, left at least 10 people dead.
During a law enforcement briefing Monday evening, Boulder Police Commander Kerry Yamaguchi said that one of the deceased was a Boulder police officer, 51-year-old Eric Talley, who was the first on the scene.
The suspect allegedly opened fire without warning in a King Soopers store, using an AR-style weapon in the attack. Panicked shoppers fled from the scene as police and SWAT team members flooded the area.
A live television feed showed officers leading a shirtless man, bloodied and handcuffed, to a squad car after the shooting.
Colorado Gov. Jared Polis responded to the tragedy on Twitter.
This is a developing story.