Police in Grand Forks, North Dakota, say that the gunman in a deadly Walmart shooting was an Air Force airman from the nearby Grand Forks Air Force Base.

Police say 21-year-old Marcell Willis walked into the store shortly after 1 a.m. Tuesday and shot two employees with a handgun, killing one and injuring the other.

Authorities say that Willis tried to shoot another worker but missed, then killed himself.

Trace Gallagher reported on "Shepard Smith Reporting" that when police arrived on the scene, there was no active shooter.

"Police officers did not fire a single shot, so therefore it was the murder-suicide that's being reported," Gallagher said, noting that the motive is currently unclear.

Gallagher reported that Walmart released a statement, saying, "We are still learning information about the events surrounding this tragedy and assisting law enforcement in their investigation."

Watch more above.

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