A list of massacres committed in the United States this year

The latest mass shooting in the United States occurred Wednesday in Winder, Georgia, where four people were fatally shot at Apalachee High School.

Students ran to safety at the football stadium. As police swarmed the campus near Atlanta, parents rushed to see if their children were safe.

It is the 29th mass shooting in the country this year, according to a database maintained by The Associated Press and USA Today in partnership with Northeastern University.

At least 127 people have died this year in such killings, defined as incidents in which four or more people die within a 24-hour period, not including the killer — the same definition used by the FBI.

Last year ended with 217 deaths from 42 mass shootings in the United States, making 2023 one of the deadliest years on record.

Here's a look at other mass killings in the United States this year:

FOREST PARK, ILLINOIS: September 2

Four people sleeping on a Chicago-area train were fatally shot on Labor Day morning. Police were called to a Chicago Transit Authority station just outside the city. A 30-year-old man was arrested. The victims were a woman and three men. A motive for the shooting was not immediately released.

IRONDEQUOIT, NY: August 31

Four people have been found dead after firefighters put out multiple fires at a home in upstate New York, though authorities said they were likely killed by something else. Firefighters found the bodies of two adults, a 2-year-old boy and a 4-year-old girl.

DALTON, GEORGIA: August 24

Four men, aged 17 to 21, were shot dead in a park. A teenager has been charged with murder in what police called a robbery that turned violent. Multiple weapons were involved.

PLANT CITY, FLORIDA: July 31

Police say an arson has killed four people near Tampa. A 25-year-old man who lived in the home has been charged with first-degree murder. Three dogs also died.

NEW YORK CITY: July 19

A grandmother, a mother and her two children, ages 5 and 4, were fatally stabbed in a Brooklyn apartment. A 24-year-old man who knew the four children has been arrested.

WEST BLOCTON, ALABAMA: July 18

A man has been charged with killing his wife and four children, ages 2 to 9, in a rural Bibb County community. The man did not comment on a motive when he was arrested. “Even seasoned officers told me it was the worst thing they've ever seen,” Sheriff Jody Wade said.

BIRMINGHAM, ALABAMA: July 13

The victims were shot inside a nightclub. One man died on a sidewalk while two women were killed inside the nightclub. Another man was pronounced dead at the hospital. Investigators believe some of the shots were fired from outside the nightclub.

ALAMEDA, CALIFORNIA: July 10

Police have arrested a man for killing his wife, two children and his wife's parents in the San Francisco Bay Area. The man's father-in-law went to a neighbor's house for help and spoke to police before he died.

FLORENCE, KENTUCKY: July 6

A birthday party turned deadly in the early hours of the morning when four people were shot and wounded. The suspected gunman, 21, crashed his car into a ditch during a chase with police and was found dead from a self-inflicted gunshot wound.

NORTH LAS VEGAS, NEVADA: June 24

A 48-year-old man, who was prohibited from owning a firearm because of a criminal record, killed himself after shooting five people, police said. The violence began after the man got into an argument with a former girlfriend. The victims at the apartment complex included a neighbor who tried to help him, as well as the man's mother and grandmother.

FORDYCE, ARKANSAS: June 21

A 44-year-old man shot people in the parking lot before shooting again inside the Mad Butcher grocery store, killing four people. Police said he did not appear to be related to the victims. The shooting happened midday in Fordyce, about 65 miles (105 kilometers) south of Little Rock.

HUDSON, FLORIDA: June 12

A homeowner has been charged with killing a family of four and burning their bodies. The two children were ages 6 and 5. The family was reported missing by relatives. Police said a backyard fire pit was on fire when they searched the property in Pasco County.

MARION, IOWA: June 5

Police say a metal pipe was used to kill four people in an outbuilding of a rural home near Cedar Rapids.

CHARLOTTE, NORTH CAROLINA: April 29

Four police officers have been shot dead in the deadliest attack on US law enforcement since 2016. They were killed when a task force of officers from different agencies tried to capture a 39-year-old man for illegally possessing a firearm and fleeing from police in another county.

YUKON, OKLAHOMA: April 22

A 10-year-old boy woke up to find his parents and three brothers dead in their home near Oklahoma City, all shot by his father, police said. Authorities believe the 42-year-old killed his wife and three sons — ages 18, 14 and 12 — then turned the gun on himself. Police said they did not immediately know why the fourth child was spared or what the motive was for the shooting.

ROCKFORD, ILLINOIS: March 27

A violent fight left four people dead in a matter of minutes and at least seven injured. Authorities said a 22-year-old man has been charged. Police did not immediately determine a motive for the attack. Rockford's mayor said the victims were ages 63, 23, 49 and 15.

IRELAND, WEST VIRGINIA: March 11

The bodies of four people, ranging in age from 3 months to 90 years old, were found in the rubble of a burning home. A fifth person, apparently shot, was found dead behind a chicken coop nearby, authorities said. A 45-year-old man was found dead by suicide about 110 miles (180 kilometers) away, parked in a vehicle outside his relatives' home. Authorities did not immediately provide details on the motive.

HONOLULU, HAWAII: March 10

Authorities said a woman and three children, ages 10, 12 and 17, were fatally stabbed in a Manoa home. The woman's husband was also found dead. Police said a preliminary investigation shows the husband fatally stabbed his wife and children. Authorities did not immediately release a motive. Police said the five deaths were the state's worst slaying since 1999. They said there was no history of domestic calls to the residence.

KING CITY, CALIFORNIA: March 3

Police say three men wearing black masks got out of a silver Kia and opened fire at an outdoor party in central California, killing three men and a woman and wounding seven others. The shooting happened on a street lined with modest homes overlooking a commercial district in King City, near Pinnacles National Park.

FERGUSON, MISSOURI: February 19

Authorities said a 39-year-old woman intentionally set fire to her home to kill herself and her four children, ages 2, 5, 9 and 9. Investigators believe the mother set fire to a mattress and left a note saying she intended to kill herself and her children, police said. Firefighters who responded found the home engulfed in flames. Neighbors tried to save the family, but the fire was too intense.

BIRMINGHAM, ALABAMA: February 16

Authorities said four men were killed in a drive-by shooting. Dozens of shots were fired outside a Birmingham home, police said. People were standing outside a home getting their cars washed when someone drove by and opened fire. No arrests were immediately reported.

HUNTINGTON PARK, CALIFORNIA: February 11

Shootings that lasted for several hours left four people dead: a man in Bell, a man in a Los Angeles mall parking lot, a 14-year-old boy in Cudahy and a homeless man in Huntington Park, authorities said. At least one other juvenile was wounded. Two suspected gang members have been arrested in connection with the shootings, authorities said.

EAST LANSDOWNE, PENNSYLVANIA: February 7

Six human remains have been found in the ashes of a fire that destroyed a home near Philadelphia, according to the county attorney's office. Authorities suspect the dead — including three children — were killed by a 43-year-old relative who also died after shooting two police officers, the office said. A motive was not immediately known.

EL MIRAGE, CALIFORNIA: January 23

The bodies of six men were found in the Mojave Desert near the sparsely populated community of El Mirage after a person called 911 and reported being shot, sheriff's officials said. The men were likely shot during an argument over marijuana, authorities said. The bodies were found about 50 miles (80 kilometers) northeast of Los Angeles, in an area known for illegal marijuana operations. Five men have been arrested and charged with murder.

JOLIET, ILLINOIS: January 21

Authorities said a 23-year-old man shot eight people, including seven family members, and wounded a ninth in a Chicago suburb. He later killed himself during a standoff with law enforcement in Texas. Authorities believe he was trying to reach Mexico. Police said the victims included his mother, siblings, aunt, uncle and two men he may not have known. They were found in two homes, outside an apartment building and on a residential street.

TINLEY PARK, ILLINOIS: January 21

A 63-year-old man killed his wife and three adult daughters in a Chicago suburb, police said. The man allegedly shot the four family members — ages 53, 24 and two 25-year-old twins — after an argument at their home. He has been charged with four counts of first-degree murder.

RICHMOND, TEXAS: January 13

A 46-year-old man shot and killed his ex-wife and three other family members, including his 8-year-old niece, in a suburban Houston home before killing himself, authorities said. Authorities said the man told his ex-wife he wanted to see them again, but she refused. In addition to killing his niece and ex-wife, he also killed her brother and sister, ages 43 and 46.

REEDLEY, CALIFORNIA: January 6

A 17-year-old boy has been charged with killing four members of a neighboring family in central California. He lived next door to the victims — ages 81, 61, 44 and 43 — in Reedley, a small town near Fresno. Three bodies were found in their yard, including one buried in a shallow grave, while another was found in the detached garage of the teen's home, police said.