Most horrific and largest U.S mass killing happened in Las Vegas last night

Last a gunman opened fire Sunday night at a country music festival opposite the Mandalay Bay Resort and Casino on the Las Vegas Strip. More than 50 people were killed and at least 400 others injured authorities said. 

 Police said the suspect, 64-year-old Stephen Paddock, a resident of  Mesquite, Nev., was killed after a SWAT team burst into the hotel room  from which he was firing at the crowd. 

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 "Right now, we believe it's a sole actor, a lone-wolf-type actor." said  Lombardo, adding that a motive for the shooting had yet to  be determined. Lombardo also said police had questioned a "person of  interest," Marilou Danley, the suspect's roommate, and determined she  was not involved in the shooting.  

 The festival is reported to have attracted about 30,000 attendees. Country superstar Jason Aldean, recently named 2017 Academy of Country Music Entertainer of the Year, was on stage when the shooting began at 10:08 p.m. local time. He was not injured. 

Jason few hours before the shooting took place.