(Marion County, OR)  --  Two people are dead and two are injured, following a fire at a mobile home in Marion County.  Sheriff's deputies say the blaze was reported around 4:45 yesterday morning at the home in the 26-hundred block of Silverfalls Highway Southeast.  Authorities say a woman and a juvenile male were found dead inside the mobile home, and a man and a juvenile male were taken to the hospital.  Investigators are trying to determine the cause of the fire.