A gunman has killed 10 people including a police officer off at a grocery market in the US state of Colorado.
The attack in Boulder ended with police detaining an injured suspect at the King soopers market.
The shooting was live streamed by the witnesses and broadcast on YouTube.
Among the dead was 51-year-old Eric Talley who was the first police officer to respond to the shooting.
No other details have been released about the nine other victims or motive for the attack.
The grocery store is located in a busy shopping plaza in Boulder a northern central Colorado city about 30 miles away from the state capital of Denver.
The supermarket attack comes less than a month a week after a mass shooting that left eight dead including Six Asian women at three spas in Atlanta.