A kayaker and two paddle boaters were injured Friday when they were struck by a motorboat allegedly driven by an intoxicated man in Kingston, police said. Emergency personnel responded to Smelt Pond just before 5:30 p.m. and determined the motorboat, driven by Joseph Carroll, 37, of Florida, struck and capsized a kayak and a two-person paddle boat and barely missed striking a canoe, said Kingston Police Sergeant Zachary Potrykus. State environmental police arrested Carroll and charged him with driving a boat under the influence of alcohol, causing serious injury and unsafe operation of a boat, Potrykus said. Police said a 41-year-old man in the kayak suffered a non-life-threatening but serious head injury, and the two women in the paddle boat suffered minor injuries. Carroll will be arraigned Monday morning in Plymouth District Court.