The Latest: Tennessee school: Teen missing in Grand Canyon

This undated photo provided by Mark McOmie shows Jackson Standefer. Authorities searched Grand Canyon National Park on Monday, April 17, 2017, for eighth-grader Standefer and his step-grandmother who were swept away as they tried to cross a creek during a family trip in a remote part of the park. Chief Ranger Matt Vandzura says the two lost their footing Saturday. (Mark McOmie via AP) (The Associated Press)

This undated photo provided by Mark McOmie shows Jackson Standefer. Authorities searched Grand Canyon National Park on Monday, April 17, 2017, for eighth-grader Standefer and his step-grandmother who were swept away as they tried to cross a creek during a family trip in a remote part of the park. Chief Ranger Matt Vandzura says the two lost their footing Saturday. (Mark McOmie via AP) (The Associated Press)

This undated photo provided by Mark McOmie shows Jackson Standefer. Authorities searched Grand Canyon National Park on Monday, April 17, 2017, for eighth-grader Standefer and his step-grandmother who were swept away as they tried to cross a creek during a family trip in a remote part of the park. Chief Ranger Matt Vandzura says the two lost their footing Saturday. (Mark McOmie via AP) (The Associated Press)

The Latest on the search for two missing hikers at Grand Canyon National Park (all times local):

12:35 p.m.

A Tennessee school has identified a student as one of two hikers who were swept away while crossing a remote creek in Grand Canyon National Park.

The McCallie School in Chattanooga released a statement Monday saying the missing hikers are eighth-grader Jackson Standefer and his step-grandmother. It didn't name the woman.

Authorities say the 14- and 62-year-old hikers were swept away Saturday while crossing Tapeats Creek, a tributary of the Colorado River below the canyon's North Rim.

A helicopter and drone on Monday are helping searchers on the ground try to find the pair, who haven't been identified by park officials. An investigation is underway.

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10 a.m.

Authorities are searching for a 14-year-old boy and a 62-year-old woman missing in Grand Canyon National Park after they were swept down a creek while crossing it in a remote part of the park.

Chief Ranger Matt Vandzura of the National Park Service says two fellow hikers alerted authorities by setting off an emergency GPS locator beacon in the backcountry area below the canyon's North Rim.

He says the two lost their footing and were swept away Saturday in Tapeats Creek, a tributary of the Colorado River.

Vandzura declined to identify the missing, the other hikers or their relationship to each other.

An investigation is underway but authorities have not concluded how the two were swept away.

A helicopter and a drone on Monday were assisting searchers on the ground.