(Portland, OR)  --  Police are investigating three armed robberies that took place at Portland bars this morning.  The first robbery happened at the Greely Avenue Bar & Grill just before one in the morning.  About an hour later, police received a call about a robbery at the Sandy Hut and then the third took place at The Hilt just before 2:30 a.m.  Police are looking into whether the three robberies are connected.