Colorado officials have identified the gunman and 10 victims aged between 20- and 65-years-old who were killed in a mass shooting inside a grocery store.
The attack at a King Soopers market in Boulder ended when police arrested the lone suspect after exchanging gunfire.
Police have not confirmed a motive. The suspect faces 10 counts of murder.
President Joe Biden has hailed a police officer and father of seven who was killed, and has called for Congress to enact stricter gun control measures.
The grocery store is located in a busy shopping plaza in Boulder, a north-central Colorado city about 30 miles (50km) away from the state capital of Denver.
It comes less than a week after a mass shooting that left eight dead, including six Asian women, at three spas in Atlanta.
President Biden on Tuesday renewed his call for a ban on assault weapons and high-capacity magazines as well as an end to loopholes in background checks.
Who are the victims?
Their names are:
- Denny Stong, 20
- Neven Stanisic, 23
- Rikki Olds, 25
- Tralona Bartkowiak, 49
- Suzanne Fountain, 59
- Teri Leiker, 51
- Eric Talley, 51
- Kevin Mahoney, 61
- Lynn Murray, 62
- Jody Waters, 65
In an emotional news conference after Monday’s shooting, Police Chief Maris Herold said the crime had left her feeling “numb”.
“I live three blocks up the street from that store,” she said. “This is my community.”