Police in Las Vegas, Nevada say a man opened fire on a country music concert late Sunday, killing 59 people and wounding 527 others, in the deadliest mass shooting in modern U.S. history.
An edited list of mass shootings that have taken place in other parts of the world:
Terrorists claiming allegiance to Islamic State carried out several coordinated attacks in the city, including shootings of pedestrians on the street and a mass shootings at the Bataclan theatre. One hundred and thirty people were killed in the combined attacks.
Islamist gunmen stormed the office of Charlie Hebdo, a satirical weekly magazine, and killed 12 people, including the paper's top editors and cartoonists, in anger over its satirical cartoons of Islamic terrorists and the Prophet Muhammad.
Al-Shabab Islamist militants, who are based in Somalia, attacked the upscale Westgate mall in Nairobi, killing nearly 70 people and wounding about 175. The siege latest for three days before government troops could end the attack.
A gunman disguised as a policeman opened fire at a youth camp for political activists on the small island of Utoya, northwest of Oslo. The gunman, who had been linked to an anti-Islamic group, killed 68 campers. Separately, the gunman set off a bomb in Oslo that killed 8 people.
Rio de Janeiro, Brazil
A 23-year-old former student returned to his public school in Rio de Janeiro and opened fire on the students, killing 12 children and seriously wounding more than a dozen others, before shooting himself in the head.
A Georgian citizen of Azerbaijani descent killed 12 students and staff at the Azerbaijan State Oil Academy. Several others were wounded.
A 17-year-old boy shot and killed 15 people at his school, Albertville Technical High School, in southwestern Germany.
Islamist terrorists carried out a series of shooting and bombing attacks across the city over the span of several days, including mass shootings at two hotels, the Taj Mahal Palace Hotel and the Oberoi Trident. The attacks left 164 people dead and a further 308 people were wounded.
A group of armed Chechen militants seized the crowded Dubrovka theater and took 850 people hostage. At least 170 people died in the terrorist attack.
A 19-year-old student opened fire at his secondary school, killing 16 people, including 13 teachers, two students, and one policeman, before killing himself.
Port Arthur, Australia
A 28-year old man opened fire at a cafe on a historic penal colony site in Tasmania, killing 35 people and wounding 23. It was the worst mass-murderer in modern Australian history.
A gunman killed 16 children and one teacher at Dunblane Primary School before killing himself.
A 25-year-old gunman shot 28 people at the École Polytechnique in Montreal, Quebec, killing 14 women, before committing suicide.