Three climbers from Renton, Washington died over the weekend after falling during a climb in North Cascades National Park.

The Okanogan County Sheriff’s Office personnel, along with Okanogan County Search and Rescue volunteers, attended to calls reporting a climbing accident near North Early Winters Spire, located approximately 16 miles west of Mazama, Washington, around 11:30 a.m. on Sunday.

Upon arrival, responders discovered that a group of four climbers from Renton—a suburb of Seattle—were involved in an accident while descending a steep gully, according to the Okanogan County Sheriff’s Office.

When crews arrived at the accident site, they found three of the climbers dead.

West side entry sign for North Cascades National Park on state highway 20 in Washington.

The National Park Service did not immediately respond to Fox News Digital’s request for comment on the matter.

The sheriff’s office thanked the search and rescue volunteers and Snohomish County helicopter crews for helping with the “tragic incident.”

“Our thoughts are with the family members and friends of those involved,” the sheriff’s office said.