BREAKING NEWS.

An active shooter situation is being reported at a popular Las Vegas mall.

There is heavy police presence and the mall is on lockdown according to initial social media reports.

KTNV Las Vegas:

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There is a heavy police presence at Boulevard Mall. There are reports of an active shooter. Police are reportedly checking each business inside of the mall.

#BREAKING police on scene of Las Vegas mall. I just arrived— working to get more details. @KTNV pic.twitter.com/CUgdFbezay

We have a crew at the scene to gather more info. Updates will be posted here >> https://t.co/A5CEhzEBBr pic.twitter.com/19IxKgmsx9

The Daily Mail is reporting witnesses are claiming the gunman is wearing a mask:

Police have swarmed Las Vegas‘ Boulevard Mall after reports of a possible active shooter.

Ambulances, and police vehicles were seen blaring their sirens and surrounding the building as armed officers reportedly guarded the entrance to Sears.

Social media users have claimed a masked man holding a gun is at the shopping mall north of Buffalo.

Police have not confirmed the reports, but parts of the mall are on lockdown and the parking lot is being cleared out, KTNV reported.

Nearby streets are also being locked down by police, and all entrances to the mall are being closed.

Helicopters can be heard flying above the mall.