By Kevin Mohatt and Keith Coffman

Police gave few immediate details of the shooting and no known motive for the violence, which unfolded at about 3 p.m. at a King Soopers grocery store in the Table Mesa area of Boulder, a city at the eastern foot of the Rockies about 28 miles (45 km) northwest of Denver.

The bloodshed marked the second deadly U.S. mass shooting in a week, following gun violence last Tuesday that left eight people dead, including six Asian women, at three locations in and around Atlanta. A 21-year-old man has been charged with those killings.

Boulder Police Chief Maris Herold said 10 people perished in the attack at King Soopers grocery. Among them were 51-year-old police officer Eric Talley, who she said was the first to respond to the shooting, about 2 miles from the University of Colorado’s flagship campus.

Police said the suspected gunman, who was arrested, was believed to be the only individual with serious injuries who survived the bloodshed.

Video footage from the scene broadcast earlier by television stations showed a shirtless, bearded man in boxer shorts being led away from the store in handcuffs, before he was placed on a stretcher and loaded into an ambulance. The man in custody appeared to have a bloody leg and was limping as he walked. (Reporting by Kevin Mohatt in Boulder, Colo., and Keith Coffman in Denver; Additional reporting by Alyson McClaran in Boulder, Sharon Bernstein in Sacramento, Calif., and Dan Whitcomb in Los Angeles; Writing by Steve Gorman; Editing by Peter Cooney and Stephen Coates)