At least 20 people killed, many injured in Las Vegas shooting

At least 20 people were killed and more than 100 others injured, hospital officials said, after a gunman in a Las Vegas hotel opened fire Sunday night at a concert outside, sending thousands of people fleeing.

The shooting happened near the Mandalay Bay Resort and Casino.

Video posted online showed the country singer Jason Aldean performing outside the hotel at Route 91 Harvest, a country music festival, before they were interrupted by the sound of automatic gunfire. The music stopped, and concertgoers ducked for cover.

Several SWAT teams were sent to the hotel, and officers reported being pinned down by gunfire, according to emergency radio traffic.

Shortly before midnight the Las Vegas Metropolitan Police Department reported that “one suspect is down,”.