A 9-year-old boy was killed in a crash on Okmulgee Lake Sunday night around 8:00.
Police were called to a report of a two boat collision.
The smaller of the two boats had several passengers on board, including two children.
The 9-year-old was pronounced dead at the scene. Another older boy was flown by Lifeflight to a hospital in Tulsa.
Investigators say a larger boat, driven by Jared Trotter was speeding when it hit the smaller boat.
Trotter was arrested for operating a boat under the influence of intoxicants and manslaughter.
In a separate crash on Keystone Lake, a man and woman from Sand Springs were killed.
Police say they too were struck by a boat.
The Oklahoma Highway Patrol reports the accident happened about 9:15 p.m. Sunday about five miles from Mannford.
The patrol says 56-year-old William Crocker and 48-year-old Cathy Crocker were riding a Sea Doo eastbound when a northbound boat crashed into them.