The suspect shooter has fled the scene before the police arrived, according to media reports.
At least two people were reportedly injured as a teenage gunman opened fire at Fashion Show Mall on the Las Vegas Strip at Las Vegas Boulevard and Spring Mountain.
A group of teenagers got into an argument and just before a fight broke out, one person pulled out a gun and fired it into the crowd, 8 News NOW reported, citing Metro Police.
According to the police reports, three people were shot and wounded but are expected to recover.
Las Vegas Police believes it was an independent incident and that there is no additional threat.
People have been advised to avoid the area while the investigation is underway.