Police prepare to enter the Columbia Mall after a gunman killed three people, including himself, in the food court of the mall in Columbia, Maryland, USA, 25 January 2014. Police were confident it was a single shooter, said Bill McMahon, chief of Howard County police, in broadcast remarks. Many in the weekend shopping crowd took cover and found hiding places, as the general public has been instructed to do. Police were scouring the mall to find anyone still sheltering, police said. EPA/JIM LO SCALZO ( USA MALL SHOOTING )