A 17-year-old boy was killed Sunday afternoon when the car he was a passenger in went off Lakeview Road in Milo and hit a tree. Sgt. Robert Cook of the Milo Police Department said the boy was a passenger in the rear seat of the two-door sedan. The 17-year-old driver and another passenger, 16, were transported to Mayo Regional Hospital in Dover-Foxcroft with unknown injuries. Cook said speed was likely a factor in the crash, which was reported around 1:20 p.m.