Westerly — One person was killed and a vessel capsized Tuesday morning when two boats collided in the waters off of Watch Hill.

The boat that was struck capsized, said U.S. Coast Guard Station New London Petty Officer 2nd Class Ryan Dismuke.

A caller reported to the Coast Guard at 10:18 a.m. that a 25-foot Parker boat had capsized in Fishers Island Sound after a 60-foot Viking yacht allegedly ran over it, according to a news release from the Coast Guard.

Coast Guard Station New London rescue crews arrived on the scene at 10:46 a.m.

With a paramedic from the Watch Hill Fire Department, Coast Guard crew members recovered the individual in the capsized boat, who was unresponsive.

A good Samaritan also had assisted before the crews arrived, the Coast Guard said.

The unresponsive individual was transported to the Stonington Town Dock and then to a local emergency medical service center, according to the release. 

The individual's identity will not be released until authorities have notified next of kin.

The Coast Guard said the Rhode Island environmental police are investigating the accident's cause.

The Coast Guard Station New London, Westerly Fire Department, New York State Police Marine Unit from Fisher's Island, and the Connecticut Department of Energy and Environmental Protection were among the rescue crews that responded to the scene.

The capsized vehicle was towed to Dodson's Marina in Stonington, according to the release.