(Portland, OR)  --  An investigation is ongoing into the discovery of two bodies in the Mount Hood National Forest.  The Clackamas County Sheriff's Office says deputies and the U.S. Forest Service found the bodies of a man and a woman yesterday morning in the forest near Estacada.  A dog was also found alive at the scene and is now being cared for by County Dog Services.  Police say they're investigating the man and woman's deaths as suspicious.