(Gresham, OR)  --  A Gresham Police drone helped locate robbery suspects Monday night.  A woman was opening her garage door when she was assaulted and robbed.  The victim was hospitalized because of her injuries.  Police used K9s and a drone in a four-hour search.  Two juvenile suspects were found hiding in the backyard of a home.  A third suspect was found a short time later.  They were all taken into custody.