Law enforcement members fly in a helicopter during a search for three armed suspects in the shooting of a Fox Lake police officer, in Fox Lake, Illinois, USA, 01 September 2015. A police officer who was pursuing three suspects on foot in a Chicago suburb was shot and killed on 01 September, news reports said. A manhunt is under way in the suburb of Fox Lake, just north of Chicago, for the three suspects, who were described as two white men and one black man. The search involved canine units and helicopters searching from the air. A SWAT team also has been deployed. People who live in the suburb have been told to stay home, and some schools were on lockdown. EPA/TANNEN MAURY

TANNEN MAURY / EPA