UPDATE: 7:05 a.m. EDT —  At least 50 people were killed and more than 200 injured in the worst mass shooting in modern American history near Mandalay Bay Resort and Casino on Sunday night, police said. They also said they have located Marilou Danley, who was earlier described as a person of interest, but didn't divulge whether she was alive or dead.

UPDATE: 6:18 a.m. EDT — Multiple news outlets have identified the shooter as 64-year-old Stephen Paddock from Mesquite, Nevada. Reports pointed out the shooter had a criminal past but said the motive behind the shooting was still unclear.

UPDATE: 5:55 a.m. EDT — The LAVMPD said they were looking for Marilou Danley as a person of interest in the shooting and described her as an Asian female of height 4’11. They also stated that they were looking for two vehicles associated with the suspect.

UPDATE: 4:47 a.m. EDT — Lombardo also said more than 20 people were killed and 100 injured in the shooting.

UPDATE: 4:45 a.m. EDT — Joseph Lombardo, the sheriff of the Las Vegas Metropolitan Police Department, addressed reporters and said the suspected shooter was dead but his companion, Marilou Danley, was still at large. 

Lombardo did not reveal the name of the suspect who is thought to be a local resident but confirmed that he opened fire from the 32nd floor of the Mandalay Bay hotel.

UPDATE: 3:36 a.m. EDT — Las Vegas police department said it didn't believe there were any more shooters in the area.

UPDATE: 3:02 a.m. EDT — The Las Vegas Metropolitan Police Department confirmed that one suspect was down. The department also requested that people refrain from live-streaming positions of officers at the scene.

UPDATE: 2:40 a.m. EDT — At least two people were dead and 24 others were hospitalized after a mass shooting near Mandalay Bay Hotel and Casino on the Las Vegas strip Sunday night, the Los Angelos Times reported.

The paper quotes University Medical Center spokeswoman Danita Cohen as saying the hospital was still evaluating the condition of “many patients” with gunshot wounds.

Police radio reports also suggested that more than three were transported to Sunrise Hospital and Medical Center for treatment.

Las Vegas Police Department was establishing a command post and triage center, and have shut down parts of the Strip.

UPDATE: 2:38 a.m. EDT — McCarran International Airport on it's official Twitter page said that some to the airport were being diverted due to reports of the shooting.

Original Story:

Police are responding to reports of an active shooter at the Mandalay Bay Resort and Casino on the Las Vegas strip Sunday night.

According to reports, the shooting occurred at Route 91 Harvest music festival, which bills itself on Twitter as “a three day country music festival on the Las Vegas Strip / Sept 29- Oct 1!”

It is not yet clear how many people have been injured.

Las Vegas Police Department confirmed on Twitter: “We’re investigating reports of an active shooter near/around Mandalay Bay Casino. Asking everyone to please avoid the area. #LVMPDnews.”

They also urged people to avoid the area.

Eyewitnesses stated that there were multiple fatalities and injuries. Many also stated that there might be more than one shooter. 

Meanwhile, photos and videos from the scene show people fleeing and police cars rushing to the scene. However, the footage remains unverified. 

This is a developing story and will be updated as more information is available.