At 8:53 P.M Saturday, LAFD responded to a reported structure fire on the 200 block of W. 23rd Street. Arriving firefighters found smoke coming from a three story apartment building. Firefighters made entry into the complex to find a small fire put out by the building sprinkler system preventing the fire from spreading. Firefighters found one male victim down in a second floor stairwell, the man was transported with C.P.R. in progress to a local hospital. No other injuries have been reported at this time. LAFD Arson investigator are enroute to the scene. At this time the cause is unknown.