A Syrian immigrant has been charged with shooting dead 10 people, including a police officer, in Boulder in Colorado state – the second mass killing in the US within a week. Boulder Police Chief Maris Herold identified the shooter as Ahmad Al Aliwi Alissa, a 21-year-old man and said that he has been charged with 10 murders.

At a news conference on Tuesday, she said that one of those killed was Eric Talley, the police officer who was the first to respond to the shooting on Monday at a grocery shop. She did not give a motive for the shooting which took place while people were also being given vaccines for COVID-19 at the shop.