The Las Vegas police department is investigating multiple reports of an active shooter in and around the Mandalay Bay Casino Sunday night.
Police are currently blocking Las Vegas Blvd. after reports of multiple shooters with fully automatic weapons on the 29th and 32nd floor of the casino.
Witnesses say multiple people have been shot. It is believed the shooters were firing into a crowd of people at the Route 91 Harvest Country Music Festival.
Flights in and out of Las Vegas-McCarran Airport are also being held because of the situation.
It is unclear at this point how many shooters there are or how many people have been injured.