DENNIS, MASS. (WHDH) - Rescue crews are looking for a missing 15-year-old in Dennis who was last seen swimming, officials said Saturday.

The teen was swimming in Bass River earlier Saturday before going under the water and not coming back up, officials said.

The Coast Guard and state police are assisting with the search.

This is a developing news story; stay with 7NEWS on-air and online for the latest details.

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