MACHIAS, Maine — The Royal Canadian Mounted Police confirmed Wednesday that an American man died Tuesday in the waters at Head Harbor Lighthouse at Campobello Island, New Brunswick.

The RCMP is not releasing the man’s name nor that of his wife, who was uninjured in the incident.

According to a press release from the RCMP, the couple that morning had walked across a footpath to the lighthouse which is exposed at low tide, and were attempting to return to the island, unaware that the tide was rising.

People familiar with the crossing said the tide rises into the stones beneath before the path is actually covered by water, and the footing becomes very wobbly.

When the couple attempted to cross, the walkway was submerged and the man lost his footing. He was swept away by the tide.

A nearby private boat heard shouts for help and pulled the man on board and then rescued the woman, who was also in the water.

Resuscitation was attempted as the man was taken by ambulance to Down East Community Hospital in Machias. He was later pronounced dead.

The incident happened about 11:30 a.m. EDT Tuesday.

The RCMP said the incident remains under investigation and no names will be provided until the investigation is complete.