CONCORD, NH. (WCAX) - New Hampshire State Police is investigating the death of a woman in the Merrimack River.

Police say it happened just before noon Sunday when 67-year-old Claire Knowles was swimming after her tube in a mild current in the river, and as she returned to shore, she suffered a medical event.

Two people nearby tried to save her life until first responders arrived to help, but Knowles was later pronounced dead.

This is an ongoing investigation, anyone with information is asked to contact NHSP.

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