Authorities have shut down part of the Las Vegas strip after receiving reports of an active shooter.
Officer Aden Ocampo-Gomez says police are heading to the scene near Mandalay Bay Hotel and Casino.
Reports stated that gunfire was heard at the Route 91 Country Music festival, which was taking place just across the road from Mandalay Bay.
University Medical Centre spokeswoman Danita Cohen said the Las Vegas hospital is taking in "several" people with gunshot wounds.
One Twitter user posted that the hotel was on lockdown, while another, citing police scanners, posted there were two shooters on the 32nd floor of the hotel who had shot at a bodyguard and police.
Authorities could not be reached to confirm those details.
We'll keep you updated.