The N.H. Fish and Game Department on Monday released the name of the Massachusetts man who died last week hiking Mount Monadnock.

The man, Charles J. Richards Jr., 78, of Concord, Mass., was hiking with two companions on the White Cross Trail just below the summit when he became unresponsive on the morning of May 27, according to the agency.

People on the mountain tried CPR for more than an hour, until paramedics arrived via helicopter at a landing zone near the summit and hiked down to his location, Fish and Game said in a May 27 release. Life-saving efforts were stopped a little after 10:30 a.m.

A preliminary investigation by the Office of the Chief Medical Examiner indicated Richards died of natural causes, Fish and Game said at the time.

The state medical examiner’s office did not immediately have information Monday on the cause of Richards’ death.

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