A body was found early this morning near San Francisco's Potrero Hill neighborhood, police said.
    Units responded to the area of Cesar Chavez Street and Pennsylvania Avenue where police received a call reporting a body had been seen at around 1:45 a.m.
    The discovery was made near Caltrain tracks that run through the neighborhood, though it could not be immediately confirmed how or when the person died.
    The incident remains under investigation, and further details were not immediately available.