(Portland, OR)  --  Police say they've made an arrest in connection to a bank robbery in St. Helens.  Police say the man entered the U.S. Bank on South Columbia River Highway yesterday afternoon and handed a teller a note demanding money.  He then fled the scene with an undisclosed amount of cash.  Police say they caught up with him on Highway 30 and tried to pull him over, leading to a pursuit that ended when the man's car became disabled.  Police say he then tried to flee on foot, but a police K-9 chased after him and took him down.  The suspect was hospitalized for minor injuries from a dog bite.