Vigils are being held across the US for victims of Sunday's shooting in Las Vegas, which left dozens dead and hundreds injured.
National and international landmarks went dark as a show of respect to the victims of the deadliest mass shooting in modern US history.
Much of the Las Vegas Strip, where the shooting occurred, went dark Monday night, as did New York's Empire State Building.
"Tonight our lights darken for the victims and those affected by the Las Vegas attack," the New York landmark said on Twitter, adding that an orange halo would be displayed to "(shine) a light on gun violence."
The lights of the Eiffel Tower in Paris also went black to commemorate the Vegas shooting as well as the two victims of a stabbing attack in the French city of Marseille on Sunday.
Memorials for the dead and wounded were also held around the US. Hundreds of students gathered at the University of Nevada, Las Vegas, and a vigil took place on the Strip near where the massacre took place.
Attendees held candles as they gathered on the corner of Sahara and Las Vegas Boulevard near a sign reading "Pray for Las Vegas."
Vigils were also held at the state university's Reno campus, in western Nevada, and in other parts of the city. At one memorial, the crowd sang the Beatles' "Let It Be."
"Reno stands in solidarity with Las Vegas tonight, in community and on campus," one attendee posted on Twitter.
At Nellis Air Force Base, north of Las Vegas, airmen and their families gathered for a candlelit memorial service in the base chapel.
"Nellis, like all of Las Vegas, was deeply saddened and affected by the Las Vegas shooting at the Route 91 Harvest Music Festival that took place downtown," the base said in a statement.
"The vigil addressed the fears of the Nellis community and need to support one another in order to move forward together."