An 18-year-old who went missing last week after his jon boat capsized in the Susquehanna River near Garrett Island was found dead Thursday, officials said.

Divers recovered the body of Mark Everett Coates III between the Tydings Memorial Bridge (Interstate 95) and the Hatem Memorial Bridge (U.S. 40), around noon on Thursday, according to the Maryland National Resources Police.

This concludes a weeklong search for the Havre de Grace teen whose 10-foot aluminum jon boat was found near Garrett Island in the Susquehanna River last Thursday. Officials said Coates had gone fishing that Wednesday.

The Susquehanna River flows 444 miles from Otsego Lake in Cooperstown, New York, to Havre de Grace, where it meets the Chesapeake Bay. Coates’ boat was found near Garrett Island in Cecil County, about half a mile upstream from where he launched it in Harford County.

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Agencies across Maryland, including Baltimore City and Charles, Baltimore and Harford counties and those nearby in Delaware and Pennsylvania aided NRP’s search, officials said. The United Cajun Navy even brought up 84 volunteers and 34 vessels to search for Coates, NRP said in a news release.

It was volunteers from the Christian Aid Ministries Pennsylvania Search and Rescue team that located Coates’ body offshore of Garrett Island Thursday.