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The N.R.A. has sued San Francisco, Calif., claiming the city is violating citizens’ constitutional right to possess arms with a new ordinance that bans the possession of high-capacity gun magazines. The suit, brought on behalf of the San Francisco Veteran Police Officers Association and four individual gun owners, is in response to a measure expanding an existing ban on sales of large-capacity gun magazines. Starting Dec. 8, it gives owners of those magazines 90 days to turn them over to police.

“These magazines are typically possessed by law-abiding citizens for lawful purposes, including in-home self-defense,” said the suit. “Limiting magazine capacity for law-abiding citizens to 10 rounds decreases public safety by giving violent criminals an advantage.”

City Attorney Dennis Herrera said he “is prepared to litigate aggressively to defend gun-safety laws that save lives, adding, “San Francisco has been one of the N.R.A.’s top targets for years, and I’m proud of the success we’ve made to protect our sensible gun safety laws.”

The gun organization also plans to sue Sunnyvale, where voters approved a similar ordinance by 2-to-1 on Nov. 5. Here is today’s report.

—Jennifer Mascia

42-year-old Barbara Giomarelli, 40-year-old Benyam “Ben” Asefa and their son, 3-month-old Samuel Asefa, were found shot to death inside their home in New Market, Md., Wednesday evening. Police said the murder-suicide was sparked by an argument. A 5-year-old girl, the only survivor of the rampage, hid during the shooting and later ran to a neighbor’s home.

—NBC Washington

A 33-year-old man was shot in the chest and a 7-year-old girl was grazed by a stray bullet that hit her home in Central City, La., Wednesday evening. A neighbor said she heard nearly a dozen shots. “I was kissing the floor. I was scared. This is ridiculous,” she said. The shooting comes a week after a 7-month-old boy was shot to death while riding in the backseat of a car with his father.

—NOLA.com

A 13-year-old boy was shot in the chest and wounded in Lafayette, La., early Wednesday. The victim had traveled from Baton Rouge with an adult relative to meet a girl he met on Facebook. As they sat in a car just down the road from the girl’s home, another car pulled up behind them and shots were fired. Police are soliciting tips.

—WAFB

Scott Greer Bybee, 26, the son of 9th U.S. Circuit Court of Appeals Judge Jay Bybee, walked into the courtyard of a Mormon temple in east Las Vegas, Nev., Tuesday night and shot himself. When officers arrived, they found Bybee dead in the courtyard. The victim had suffered for years from depression and his parents had tried several types of treatment.

—Las Vegas Review-Journal

46-year-old Paul Parisi, a veteran A.T.F. agent, and his wife, 47-year-old Jannine Parisi, were found dead at their home in Chantilly, Va., early Wednesday. Police said the shooting was domestic. Two teenage girls inside the home heard the gunshots and fled to a neighbor’s house. Paul Parisi had worked for the A.T.F. since 1993. He was a special agent in the arson and explosives group. Jannine Parisi was a physical education teacher at a middle school.

—NBC Washington

Two people were shot and killed, another was critically wounded and the shooter committed suicide in Miami-Dade County, Fla., Wednesday afternoon. The incident, which encompassed three different crime scenes, may have been sparked by a dispute among neighbors. The shooter is believed to have opened fire on neighbors, escaped in a car and then turned the gun on himself.

—Miami Herald

Two women and a man were shot in the head and killed and two others were wounded at an apartment complex in Cypress, Tex., Wednesday afternoon. Witnesses told deputies that a man shot the victims in one apartment, closed the door and fled. Earlier this month, two teenagers were killed and 20 were injured in a house party in Cypress.

—USA Today

Bridgette Holt, 47, was shot to death outside an office building in midtown Atlanta, Ga., early Wednesday. The man suspected of shooting her, Douglas Hope, 43, committed suicide that afternoon. Police declined to say how the victim and shooter knew each other, but have called it a “domestic-related” incident.

—AJC.com

On Wednesday evening in Atlanta, one person was injured in a drive-by shooting in a South Fulton neighborhood. The victim was wounded when a car drove by firing multiple shots into his home. Police don’t have a description of the vehicle.

—11Alive.com

A woman and five men were injured in separate shootings in the Longwood Manor, Englewood, Austin and Logan Square neighborhoods of Chicago, Ill., Tuesday. The victims include two boys, 16 and 17.

—Chicago Tribune

A man in his 20s was shot and killed in a motel in El Cajon, Calif., Wednesday afternoon. No information regarding a possible suspect was released.

—ABC 10 News

A 23-year-old man was shot and killed on the north side of Milwaukee, Wis., Wednesday afternoon. Witnesses heard at least six or seven shots fired. Family members say the victim had earbuds in at the time of the shooting. Police believe the victim was targeted. About an hour later in the same area, a fight led to a shooting that wounded a 20-year-old man. No suspects from either shooting are in custody.

—Fox6Now.com

A 21-year-old man was shot in the head and seriously wounded in a home in Vacaville, Calif., Wednesday morning. The incident is believed to have started as a disturbance between family members that escalated to gunfire. No one has been taken into custody.

—The Reporter

A 22-year-old man and a 20-year-old woman were wounded in a shooting the the Laurel District of east Oakland, Calif., Tuesday night. The victims were in a car that was stopped at a stop sign when two men standing outside the vehicle opened fire. No word on a motive. The suspects fled on foot and are being sought.

—Contra Costa Times

A woman was shot in the head and wounded as she drove away from an argument at a home in Roanoke Rapids, N.C., Wednesday night. The woman’s 7-year-old son was in the car with her at the time but was not hurt. Investigators charged 30-year-old Joshua Arrington with attempted murder.

—11ABC

A 26-year-old man was shot several times and killed in Gentilly, La., Wednesday. In a separate shooting in a home in Gentilly an hour and a half later, one person was killed and another person was critically wounded.

—NOLA.com

One person was shot during a carjacking in east Charlotte, N.C., Wednesday afternoon. Police said the vehicle was stolen with an adult and a child inside. The adult was shot, and the thieves drove off with the child. A short time later, the vehicle was recovered nearby with the child unharmed. The suspects have not been apprehended.

—Charlotte Observer

William Terrell, 37, was shot and killed in the parking lot of a coin-operated laundry in West York, Pa., Wednesday afternoon, setting off a manhunt. No one has been apprehended. No word on a motive.

—YorkDispatch.com

A 19-year-old man was shot and critically injured during a drug deal gone bad in Lawrenceville, Ga., Tuesday night. When the transaction went awry, one of the drug dealers produced a handgun and shot the victim.

—Gwinnett Daily Post

A 42-year-old man was found shot and critically injured in a car in Phoenix, Ariz., early Wednesday. A witness passing by Mission Drive Baptist Church saw the car crashed into a gate. Police are investigating.

—MyFoxPhoenix.com

A woman was shot in the stomach while driving in Lodi, Calif., Tuesday night. Police are investigating.

—Lodi News-Sentinel

Two people were shot after a woman’s attempt to collect a $20 debt went awry in Fayetteville, N.C., Tuesday night. Ashley Michelle Emerick, 24, went to the residence looking to collect the money, and an argument ensued. Police haven’t identified the victims. Emerick has been charged with attempted robbery with a dangerous weapon.

—FayObserver.com

Nathanial Grant, 32, was shot and wounded at a home in Omaha, Neb., Tuesday night. Angel Brown, 27, was assaulted. Police have released few details.

—WOWT.com

Bladimir Hernandez was shot in the leg in Collier County, Fla., Tuesday, and his wife, Kimberly Webster, was arrested. Last month Hernandez filed for a restraining order against Webster but was denied by a judge.

—WZVN

A man and a woman were shot and wounded in St. Louis, Mo., early Tuesday, and drove to a nearby Walgreens seeking help. No word on suspects.

—Fox2Now.com

William Henry Morris was shot in the back with a shotgun outside a home in Custar, Ohio, Wednesday afternoon. Thomas J. Boyer, 53, was arrested. The circumstances of the shooting are not known.

—The Blade

A man was shot and wounded in north Little Rock, Ark., Wednesday night. Around the same time, a man was shot and wounded at a nearby apartment complex. No word on whether the shootings are related.

—THV11

According to Slate’s gun-death tracker, an estimated 10,737 people have died as a result of gun violence in America since the Newtown massacre on December 14, 2012.