At least 10 people, including a police officer, were killed in Boulder, Colorado, on Monday afternoon making this the second US mass shooting in a week. A gunman opened fire at a King Soopers grocery store, police said and a suspect is in custody however no motive has been revealed. Officers initially responded to a report of someone being shot in the parking lot of the supermarket and, when they arrived at the scene, a suspect carrying a long gun opened fire on them. Eric Talley, 51, an 11-year veteran on the Boulder force, was the first officer to arrive on scene, where he was fatally shot.