In the United States, two people have been killed in a shooting incident at a Walmart store on Grand Street in Thornton. One is injured. <br/><br/>In a tweet, Thornton Police has advised the people to stay away from the area as it is responding to the attack. Police have also closed the roads surrounding the store. <br/><br/>According to some local news channels, few ambulances were rushing to the Walmart, describing the scene as chaotic.