A Cherokee County firefighter is in intensive care following a fatal blaze Sunday that also injured two of his colleagues, according to WAGA-TV.Firefighter David Gray sustained lung injuries and smoke inhalation after bricks fell on top of him while battling a house fire in the 800 block of Commons Court in the Kingston Square Subdivision shortly after 1:30 a.m.Two residents were killed in the blaze and crews found the structure fully engulfed when they arrived.