Facebook CEO and founder Mark Zuckerberg, responding to the Las Vegas concert massacre Monday, said he does not understand why such acts aren't more difficult to pull off.
He also pointed out that the social network had activated its Safety Check feature, so users can mark themselves as being safe after the shooting.
Sunday night, a gunman identified as 64-year-old Stephen Paddock opened fire from a 32nd-story hotel room at the nearby Mandalay Bay hotel on a crowd of more than 22,000 people at the Route 91 Harvest Festival, as country music star Jason Aldean was wrapping up the three-day outdoor event.
Paddock had checked into the hotel room on Thursday, authorities said, describing him as a retiree with no criminal record in the Nevada County where he lived. The suspect shot himself before officials were able to enter the room.
The death toll makes the Las Vegas shooting the largest mass killings in the United States in modern years. However, notes CNBC, the United States has been the scene of hundreds of mass shootings in 2017.
Zuckerberg did not specifically call for additional measures to control guns in the United States through his post.
Facebook COO Sheryl Sandberg also responded to the massacre on her own Facebook page, saying the victims were killed "senselessly."