A man hiking in the Grand Canyon has died after being found unresponsive over the weekend, marking the third death in the national park within the last three weeks.

A 50-year-old unresponsive male hiker was found on the Bright Angel Trail in the Grand Canyon about 100 feet from the trail head on Sunday, according to the Grand Canyon Regional Communications Center.

Bystanders began CPR while emergency personnel responded to the scene, but efforts to resuscitate the hiker were unsuccessful.