One person died after a fire broke out around 4 a.m. Tuesday, Oct. 13, at an apartment building in the 1400 block of North Harlem Avenue in River Forest, fire officials said. Firefighters arrived to find heavy smoke coming from the two-story building. A witness reported seeing at least one person jump from a second-floor window while trying to escape; that person’s condition was not known. Crews later found a victim who had been unable to get out. The victim’s identity has not been released. The cause of the fire was not immediately known, and an investigation is underway.