Las Vegas Massacre

Las Vegas attack: Shooter Stephen Paddock had 'bump-stock' devices to convert semi-automatic firearms into fully automatic ones

The gunman who unleashed hundreds of rounds of gunfire on a crowd of concertgoers in Las Vegas had two "bump-stocks" that could have converted semi-automatic firearms into fully automatic ones, officials said.

Las Vegas massacre: Investigators search for motive behind deadliest mass shootout in US history

Investigators worked feverishly on Tuesday to find out why a retired accountant gunned down at least 59 people and wounded over 500 others at an open-air concert in Las Vegas, raking the crowd with bullets from a 32nd-floor hotel room packed with weapons.