Two men die and ten others are injured in a mass shooting at a Halloween party in Greenville, Texas.
The suspect in the mass shooting at an Independence Day parade in Highland Park, Illinois, U.S., is formally indicted on 21 counts of first-degree murder, 48 counts of attempted murder, and 48 counts of aggravated battery. There are three counts per slain victim and two counts per injured victim.
At least six people are killed in a mass shooting at a rehab center in Tlaquepaque, Jalisco, Mexico.
Four people are killed in a mass shooting at an apartment complex in West Jefferson, Ohio. The killings mark the village's first homicides in nine years.
A teenager is killed and 20 others are shot, including an off-duty police officer, in a mass shooting at a large gathering in Southeast Washington, D.C. Police are searching for at least three shooters.
Two suspects are arrested in Oregon in connection to a mass shooting at a residence in Valhermoso Springs, Alabama, on June 4 that killed seven people.
Police say five people were shot dead and another four injured at a Halloween party in Orinda, California. An investigation is currently underway.
A mass shooting at a Halloween party at a residence in Long Beach, California, by at least one gunman, who is believed to have targeted the party but to have fired at random, kills three and injures at least nine, with some having significant injuries.
Three people are killed and four others injured in a mass shooting at a house party in Hobbs, New Mexico, U.S.
A mass shooting at a nightclub in Salamanca, Guanajuato, Mexico, kills at least 15 people and leaves another seven people wounded.
A Dutch court rules police are liable for a mass shooting at a shopping centre that killed six and wounded sixteen because the gunman should not have been issued a firearms licence.