A 1-year-old girl is dead and her 2-year-old sister injured after an 8-year-old boy accidentally shot them at a Florida motel

At least 10 mass-casualty shootings that erupted out across the country between Friday and late Sunday.

A customer allegedly shot two Subway sandwich employees over too much mayonnaise on his meal.

Shooting killed a co-worker and wounded two others at an a Chicago warehouse.

The baby was being driven home by her father when the shooting occurred Friday evening in Chicago's South Shore neighborhood, according to police.

The shooting occurred early Sunday at a private venue in South Tacoma, where a large crowd was gathering.

At least eight people were injured early Sunday when gunfire broke out at a rave dance party being held in an industrial area of Tacoma, Washington, police said.

A 5-month-old baby was killed while sitting in a car in Chicago during a violent weekend in which at least 20 people shot in the city, according to police.

3 shot at WeatherTech warehouse in Chicago suburb, authorities confirm.

One person is dead and two others were injured after a shooting broke out at a WeatherTech warehouse in Bolingbrook, Chicago, Saturday morning.

The attacker fired several shots outside a popular bar with the LGBTQ+ community in Oslo's city centre, killing two.

Two people were shot and killed and 10 were injured early Saturday in a nightclub in Oslo, Norway, in what Oslo Police now suspect was a terror attack.

The rate of young people dying by suicide by means of firearm has increased faster than any other age group, according to a recent report by Everytown For Gun Safety. ABC News' Morgan Norwood reports.

The shooting happened on Wednesday as the train was moving between stations.

A judge ordered Oakland County officials to release surveillance video that captured the shooting inside Oxford High School on Nov. 30, 2021.

Philadelphia District Attorney Larry Krasner and Police Commissioner Danielle Outlaw speak about efforts to control the gun violence in the city that recently set a grim record for gun deaths.

Young people in Philadelphia recount near-death experiences with bullets, as community leaders desperately search for solutions.

A group of senators released a new gun control bill they have been negotiating in the weeks after the Uvalde, Texas, school shooting

The percentage of the police force that are women is growing slowly.

Robert Findley Smith, who has a license to sell firearms by ATF, allegedly did not notify federal authorities of the missing guns at his shop.

Funerals for three people killed by a gunman during a church potluck dinner will be held this week in Alabama

At least eight shootings that broke out across the country between Friday and early Monday.

The federal gun safety proposal announced last week might not have prevented the Uvalde shooting had it already been in place, experts tell ABC News.

A teacher in Ohio is alarmed that Gov. Mike DeWine signed a bill to make it easier for educators to carry guns in classrooms.

Multiple people, including a police officer, were injured in a shooting in Washington, D.C., Sunday night, officials said.

New York City police say an early-morning shooting at a gathering in Harlem left a man dead and eight other people wounded

The gunman sat by himself, drinking liquor, rejecting offers to join the others.

An 84-year-old man and a 75-year-old woman were shot dead at a small church group meeting in Vestavia Hills, Alabama, Thursday night, authorities said.

Police say the church was hosting a potluck dinner when the suspect, who was in attendance, opened fire.

Authorities said a 70-year-old man, who police said was an “occasional attendee” at the church, fatally shot three people at St. Stephen’s Episcopal Church near Birmingham, Alabama.

The lawsuit by 20 students who attend school in the Oxford Community School District was filed in federal court.

ABC News' correspondent Elwyn Lopez and former FBI agent and ABC News' contributor Brad Garrett analyze statements from Alabama officials and the dynamics of the shooting.

Investigators say the suspected gunman attacked a church group meeting in Alabama.

At least two people are dead after police say a gunman opened fire on parishioners during a potluck dinner. ABC News’ Mona Kosar Abdi reports.

Alabama officials give an update on the deadly church shooting and the ongoing investigation.

Police said two people were shot and killed and one injured at a church in Vestavia Hills, Alabama, on Thursday.

The shooting at a church meeting left two dead and one injured

Another person was also injured in the shooting at St. Stephen's Episcopal Church in Vestavia Hills, Alabama, Thursday night.

Danielle Outlaw, the head of the Philadelphia Police Department, responds to the city's recent mass shooting and discusses the escalating gun violence across America.

Multiple school districts in the Kansas City, Missouri, area closed their doors on Wednesday in the wake of a mass shooting threat.

A third arrest has been made in a mass shooting in Chattanooga, Tennessee, where three people died and 14 were injured

Some relatives of students gunned down at Robb Elementary School say they're hopeful about the proposed federal gun legislation announced on Sunday.

A 7-year-old boy was inside his home when he was shot and killed by outside gunfire, Harris County, Texas, authorities said.

Philadelphia officials announced they will spend $1.8 million on installing security cameras near city high schools and middle schools in high crime neighborhoods.

Duncanville police officers shot and killed a man suspected of opening fire at a children's summer camp. No one was injured in the incident.

More than 200 creators signed an open letter urging Hollywood to reconsider the portrayal of gun violence on screen.

U.S. Secretary of Education Dr. Miguel Cardona speaks exclusively with "GMA3" about Washington’s response to the gun violence crisis in America and reacts to calls to arm teachers.

ABC News sat down with four survivors of the mass shooting in Newtown, Conn.

The massacre at Robb Elementary School in Uvalde, Texas, marked the seventh deadliest mass shooting in recent U.S. history.

At least 10 mass shootings have occurred across the country since Friday night, adding to a string of consecutive weekends in which multi-casualty incidents occurred.