A person walking in the area told Newburyport Police they saw the boat partially submerged while docked at Cashman Park around 4 a.m. on Friday, June 17, Newburyport Fire said.
Crews immediately secured the vessel but were unsure what caused it to sink, the department said. While the tide was outgoing at the time of the sinking, it is unclear if that was the cause.
The vessel has also been active on the river over the past week. Investigators will determine if the vessel can return to service, the department added.
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