Saco police arrested three men following an investigation into drug activity at a cottage on Route 1. The Saco Police Department launched the investigation after receiving a tip from Scarborough police about suspected drug activity in a cottage near the Saco-Scarborough town line. An undercover officer on Thursday saw a man leave the cottage at 1036 Portland Road, walk to a vehicle and transact what the officer suspected was a drug deal, according to Saco Deputy Chief Jeffrey Holland. The driver of the car, 34-year-old Kenny Burke of 137 New Road in Arundel, was stopped and arrested after police found him in possession of .6 grams of heroin, needles used to inject drugs and cash, Holland said.