GRAND CANYON NATIONAL PARK, Ariz. (AP) " The Latest on the search for two missing hikers at Grand Canyon National Park (all times local):

2:15 p.m.

Family members say two hikers swept away while crossing a remote creek in Grand Canyon National Park are the wife of a founder of Merrell Boot Co. and her stepgrandson.

The uncle of the missing Tennessee teen told The Associated Press on Monday that Jackson Standefer, his mother and his stepgrandparents were crossing a water trail Saturday evening when Jackson and Lou-Ann Merrell fell in and were swept away by the water.

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Mark McOmie identified the stepgrandparents as Randy Merrell, founder of the popular outdoor footwear company, and his wife.

The McCallie School in Chattanooga, Tennessee, says in a statement that Jackson was an eighth-grader at the all-boys school.

Searchers on the ground and a helicopter and drone on Monday are trying to find the pair.

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This item has been corrected to show Randy Merrell's name was misspelled, Merrill.

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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.

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This corrects spelling of Merrell's last name and that he is one of the founders of the Merrell Boot Co.