A Chicago firefighter was seriously hurt battling a blaze in Humboldt Park on Sunday evening. The fire broke out about 6 p.m. in a three-story building in the 800 block of North Hamlin Avenue, Chicago fire officials said. Officials say one firefighter was seriously hurt battling a fire in a building in Humboldt Park on Sunday night.Jake Wittich/For the Sun-Times The firefighter suffered injuries from a fall and was taken to a hospital, officials said. No further information was released.The cause of the fire is under investigation. This is a developing story; check back for more information.