Las Vegas Police said they received calls about a person with a gun at the Boulevard Mall Thursday evening.
No injuries have been confirmed, and no reports of shots fired. The mall was evacuated while officers made sure the person with a gun was not inside the mall.
Police told the media during a press briefing that video has been obtained of a person wearing a mask with a long gun. At this time, no one has been arrested.
The incident began shortly after 7 p.m. PT.