Then, Wednesday afternoon, several people were shot and some were killed in a medical building in Tulsa, Oklahoma, Tulsa police said.
The Arms Violence Archive, a nonprofit organization, counted at least 227 of those shootings, defined as one in which four or more people were killed or injured, as of the end of May. Of those shots, 11 involved four or more fatalities.
The group recorded 693 mass shootings last year, 28 of which involved four or more fatalities.
Here is a partial list of this year’s mass shootings.
June 1: Tulsa, Oklahoma.
Several people were shot and some died in a medical building next to Saint Francis Hospital in Tulsa, Oklahoma, Tulsa police said. According to police, the assailant, who was armed with a rifle, was dead.
May 24: Uvalde, Texas
A gunman killed 19 children and two teachers at Robb Elementary School in Uvalde, Texas, about 80 miles west of San Antonio.
Law enforcement officers shot dead the gunman, identified as 18-year-old Salvador Ramos, but not more than an hour after he entered the school, and raised questions about whether they could have been killed. save lives if they had acted before.
The U.S. Department of Justice has said it will review law enforcement response.
May 15: Laguna Woods, Calif.
One gunman killed one person and seriously injured four other members of the Irvine Taiwanese Presbyterian Church in Laguna Woods, California. The congregation, which serves in the Presbyterian church in Geneva, dominated the gunman and grabbed him, preventing further bloodshed, authorities said.
The suspect, David Chou, 68, is a Las Vegas man with a wife and son in Taiwan who had traveled to Orange County with a grievance against Taiwanese, authorities said. He was charged with murder and five counts of attempted murder in what Orange County Sheriff Don Barnes called a “politically motivated hate incident.”
May 14: Buffalo
A memorial to the victims of the mass shooting at a Tops grocery store in Buffalo. Credit … Kenny Holston for The New York Times
A gunman with an assault weapon killed 10 people and injured three others at a Tops supermarket in a predominantly black area of Buffalo, authorities said.
The suspect, 18-year-old Payton S. Gendron, is white, and the 10 people who died were all black. Prior to the attack, Mr. Gendron had published a nearly 200-page racist text online. He pleaded not guilty. He faces life in prison if convicted.
May 13: Milwaukee
At least 16 people were shot dead in a shooting in central Milwaukee, in a popular nightlife area a few blocks from the arena where an NBA playoff game ended hours earlier, authorities said.
April 27: Biloxi, Miss.
The owner and two employees of the Broadway Inn Express motel in Biloxi, Mississippi, were shot dead and another person was also shot dead during a car theft. The suspect, 32-year-old Jeremy Alesunder Reynolds, was found dead, CBS News reported.
April 12: Brooklyn
A gunman opened fire on a crowded subway car during the morning rush and injured 10 people, the worst attack on New York City’s subway system in decades. More than a dozen other people were also injured, with some suffocation with smoke from the two devices that police said the gunman detonated before starting firing. No one was killed.
One suspect, Frank R. James, was arrested the next day and charged with committing a terrorist attack on a public transportation system. If convicted, he could face life in prison.
April 3: Sacramento
Authorities are searching for the scene of a shootout with multiple deaths in Sacramento, California. Credit … Rich Pedroncelli / Associated Press
As partygoers left nightclubs in a two-square-foot area of downtown Sacramento, a bombardment killed six people and injured 12, authorities said. Days later, the Sacramento Police Department said “gang violence” was at the center of the shooting, which involved at least five gunmen.
March 19: Dumas, Ark.
Two people took part in a shooting and shot a crowd, killing one spectator and injuring 27 others, including six children, at a community event and a car show in the small farming community of Arkansas.
Jan. 23: Milwaukee
Law enforcement officers were called to a Milwaukee home for a welfare check and found six people who had been shot dead. The victims, five men and a woman, had been shot, police said, and evidence at the start of the investigation suggested the killings had been directed.