Cop among 10 dead in Colorado supermarket shooting; suspect arrested

A shooting at a Colorado supermarket killed 10 people Monday, including a police officer, and a suspect was in custody, authorities said. (Theo Stroomer/The New York Times)

Video posted on YouTube showed one person on the floor inside the King Soopers store and two more outside on the ground, but the extent of their injuries wasn't clear. What sounds like two gunshots are also heard at the beginning of the video. (AP)

Police continue their investigation at a King Soopers grocery store where authorities say multiple people were killed in a shooting, Monday, March 22, 2021, in Boulder, Colo. (AP Photo/David Zalubowski)

The suspect was getting medical treatment and there was no further threat to the public, authorities said. (Theo Stroomer/The New York Times)

Police officers walk away from the Boulder King Soopers grocery store after a shooting that killed multiple people in Boulder, Colo., on Monday, March 22, 2021. (Theo Stroomer/The New York Times)

Boulder police Chief Maris Herold announced the death toll at a news conference Monday night, fighting back tears. (Theo Stroomer/The New York Times)

Police vehicles in the parking lot of the Boulder King Soopers grocery store after a shooting that killed multiple people in Boulder, Colo., on Monday, March 22, 2021. (Theo Stroomer/The New York Times)

Victims’ families were still being notified so their names weren’t released, Boulder County District Attorney Michael Dougherty said. (Eliza Earle/The New York Times)

White House press secretary Jen Psaki tweeted that President Joe Biden had been briefed on the shooting. (Eliza Earle/The New York Times)

Law enforcement vehicles and officers massed outside the store, including SWAT teams, and at least three helicopters landed on the roof in the city that’s home to the University of Colorado and is about 25 miles (40 kilometers) northwest of Denver. (Eliza Earle/The New York Times)

Boulder District Attorney Michael Dougherty speaks during a press conference outside of the Boulder King Soopers grocery store after a shooting that killed multiple people in Boulder, Colo., on Monday, March 22, 2021. (Eliza Earle/The New York Times)

Boulder Police Department Commander Kerry Yamaguchi speaks during a press conference outside of the Boulder King Soopers grocery store after a shooting that killed multiple people in Boulder, Colo., on Monday, March 22, 2021. (Eliza Earle/The New York Times)

Safety officials help people outside of the Boulder King Soopers grocery store after a shooting that killed multiple people in Boulder, Colo., on Monday, March 22, 2021. (Eliza Earle/The New York Times)

People comfort each other outside of the Boulder King Soopers grocery store after a shooting that killed multiple people in Boulder, Colo., on Monday, March 22, 2021. (Eliza Earle/The New York Times)

Police gather near the Boulder King Soopers grocery store after a shooting that killed multiple people in Boulder, Colo., on Monday, March 22, 2021. (Theo Stroomer/The New York Times)