(MARINETTE, WI.)– Law Enforcement officials released the names of the two Milwaukee-area men, who were killed in an ATV accident early Friday in the town of Silver Cliff. The driver, 37-year-old Tristan Scott Gilgenbach, was treated at the accident site at Beverly Lane and Boat Landing Road and was transported to Bay Area Medical Center in Marinette, where he later died of massive head and internal injuries, Marinette County Sheriff Jerry Sauve said. The passenger, 35-year-old Matthew Allan Nitecki, was thrown from the ATV and pronounced dead at the accident site from head, neck and internal injuries, Sauve said. Neither man was wearing a helmet or protective gear, and deputies suspect speed and alcohol to be factors in the crash, according to the sheriff.