This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

CHATTANOOGA, Tenn. — The four Marines killed in a domestic terrorism attack Thursday in Chattanooga have been identified.

They are Gunnery Sgt. Thomas Sullivan, Lance Cpl. Skip Wells, Staff Sgt. David Wyatt and Sgt. Carson Holmquist.

Family members and friends said Gunnery Sgt. Thomas Sullivan was shot and killed in the attack.

He was an Iraq War veteran and Purple Heart recipient.

Originally from Springfield, Massachusetts, Gunnery Sgt. Sullivan joined the Marines in 1997.

“He was our hero,” a Facebook post states, “and he will never be forgotten.”

Lance Cpl. Wells was another of those gunned down, according to friends of his family.

A 2012 graduate of Sprayberry High in the Atlanta suburb of Marietta, Georgia, he was studying history at Georgia Southern University.

He had loved being part of his high school’s ROTC program.

Many members of his family served in the military, said Garrett Reed, a close friend of Lance Cpl. Wells.

“He loved his country,” Reed said.

Staff Sgt. Wyatt, originally from Russellville, Arkansas, was also killed, according to The Tennesseean.

Fox News named Sgt. Holmquist, originally of Grantsburg, Wisconsin, as the fourth victim.

Mohammad Youssef Abdulazeez, 24, opened fire at two military recruitment centers.

Shots were first fired at the Armed Forces Career Center, then the Naval Reserve support center where the Marines were hit.