The Southampton Town bay constable’s office on Monday was continuing its investigation into the cause of a collision between two boats in Seatuck Cove in Eastport on Sunday night during which a 10-year-old boy was thrown from a vessel, according to town police.

Southampton Town police on Monday identified the operators of the boats as Robert Giordano, 81, of Eastport, and Steven Hornstein, 58, of Woodbury.

advertisement | advertise on newsday

Southampton Town Police Lt. Susan Ralph said the collision occurred around 9:50 p.m. about a half-mile off South Bay Avenue in Moriches Bay. Ralph said the crash happened between a 26-foot Boston Whaler with six people aboard that was being operated by Hornstein, and a 19-foot Monterey with four passengers that was being operated by Giordano.

No one on the Whaler was injured, but three people on the Monterey were injured, Ralph said. She identified the injured as a father, his 10-year-old son — who was ejected from the boat — and the son’s 10-year-old friend.

Ralph said the boy who was ejected was airlifted to Stony Brook University Hospital and was treated for minor cuts and released. She added that the boy’s father and the other 10-year-old were taken to Peconic Bay Medical Center by the Westhampton Beach Volunteer Ambulance Squad and were treated for minor lacerations and released.

No charges had been filed in the case.