Wyoming Marine Rylee McCollum, 20, an expectant father, killed in Afghanistan airport attack

Grace Hauck

A Marine and expectant father from Wyoming was among the 13 American troops and more than a hundred Afghans killed in a suicide bombing Thursday near Kabul's Hamid Karzai International Airport, Wyoming state officials said Friday.

Rylee McCollum of Jackson was among the dead, officials said.

"I’m devastated to learn Wyoming lost one of our own in yesterday's terrorist attack in Kabul," Gov. Mark Gordon said in a statement thanking McCollum for his service.

McCollum attended Jackson Hole High School and Summit Innovations School, graduating in 2019.

Rylee McCollum

"Saying that I am grateful for Rylee’s service to our country does not begin to encapsulate the grief and sadness I feel today as a mother and as an American. My heart and prayers are with Rylee’s family, friends, and the entire Jackson community," State Superintendent of Public Instruction Jillian Balow said.

"We will find many ways to honor Rylee for this ultimate and untimely sacrifice in the coming months and years – but for now, my arms are wrapped around Rylee’s loved ones from afar and I pray they find some comfort."

The U.S. Department of Defense on Saturday confirmed McCollum's death.

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"It is with extremely heavy hearts that we learned several Marines and other service members were killed and wounded in the Kabul attacks today. Our thoughts and prayers are with the families as they are notified of this devastating loss," David Berger, commandant of the Marine Corps, said in a statement.

The Jackson Hole News & Guide reported McCollum was a "brother, a son, friend, husband and soon-to-be father to a baby due in three weeks."

Roice McCollum, Rylee's older sister, confirmed to the Casper Star-Tribune, Wyoming's statewide newspaper, that McCollum was expecting a baby in three weeks.

This December 2019 photo, provided by Regi Stone, shows Eli Stone, left, and Rylee McCollum, at Christmas in Stone's house in Jackson, Wyoming.

"He wanted to be a Marine his whole life and carried around his rifle in his diapers and cowboy boots," McCollum's sister told the Star-Tribune. "He was determined to be in infantry... Rylee wanted to be a history teacher and a wrestling coach when he finished serving his country. He's a tough, kind, loving kid who made an impact on everyone he met. His joke and wit brought so much joy."

Chi McCollum, another of Rylee's sisters, called her brother "my hero, our hero, an American ... hero" in a Facebook post Friday.

"My heart is completely shattered," McCollum wrote. "I love you so much."

Earlier this month, McCollum wrote a post on Facebook telling her brother to "stay safe," and adding, "Can’t wait for your return and to meet my niece or nephew."

The death toll from the blast includes 11 U.S. Marines, a Navy hospital corpsman, and one Army soldier, American officials said. At least 18 U.S. service members were injured. It was the deadliest day for American forces in Afghanistan since August 2011.

About 169 Afghan people died, officials told the Associated Press. CBS News was reporting that number at 170.