Lincoln fire department responded to an apartment fire with people trapped. Upon arrival Engine 4 and Engine 1 found ground level apartment block construction with heavy black smoke showing. Lincoln Police pulled three victems (mother, 3y.o. and 5 month old) from the burning apartment. LPD advised from the father that a 52y.o. was still inside overcome by the fire. Firefighters went into the burning apartment without a hose line and located the 52 y.o. female and removed her from the building just as the fire began to intensify. At this time all survived and have been upgraded at this time. All recieved burns and are being treated at a burn unit.