In the week between the Atlanta attack and a grocery store in Boulder, Colorado, there were at least seven mass shootings. In the following week, this number more than doubled.
CNN defines a mass shooting as a shooting incident that can cause four or more casualties (death or injury), but does not include the shooter.
Authorities said that in a mass shooting at an office building in Orange, California, four people, including a child, were killed and another was injured.
March 31: Washington, DC
The Washington DC Police Department said five people were shot dead in Washington. The incident started as a dispute and ended up with two deaths and three injuries.
March 28: Cleveland
According to WOIO, an affiliate of CNN, seven people were shot dead in a nightclub in Cleveland. According to the radio report, the victims were four men and three women, all aged between 20 and 30. The police believed that several people were expelled from the nightclub.
March 28: Chicago
According to CNN affiliate WLS, four people in an SUV were shot dead on the I-57 highway. All were taken to the hospital in critical condition.
March 28: Essex, Maryland
According to CNN affiliate WBOC, citing Baltimore County police, a man killed his parents before shooting at a convenience store, killing three people. The suspect committed suicide.
March 27: Chicago
According to WBBM, an affiliate of CNN, the four were shot dead near Chicago’s South Austin. The radio reported that the victims included 42-year-old, 53-year-old and 64-year-old men who were all near the sidewalk when they were shot.
March 27: Yazoo, Mississippi
According to WLBT, a subsidiary of CNN, at least seven people were injured in a mass shooting at a nightclub. The station reported that at least six people were shot and another suffered cuts.
March 27: Canyon River, Illinois
According to WLS, an affiliate of CNN, three people were injured and one person was killed in the shooting on the party bus. The police said that the occupants of another vehicle opened fire on the bus when it stopped at the intersection.
March 26: Virginia Beach, Virginia
According to the City of Virginia Beach, three shooting incidents occurred in the city, resulting in eight injuries and two deaths. The police responded to the shooting incident and found eight victims with gunshot wounds ranging from serious to life-threatening injuries. Police officers heard another gunshot nearby and found a female victim who died from a gunshot wound.
The city said the suspected gunman succumbed to his wounds after a shooting involving an officer.
March 26: Chicago
According to WLS, an affiliate of CNN, a gathering near Wrightwood in Chicago turned into a mass shooting. According to the radio report, two gunmen opened fire in the venue, wounding seven people, and shot and killed a 26-year-old man.
March 26: Norfolk, Virginia
According to WTKR, an affiliate of CNN, the police responded to the shooting that injured four people. The victims-two 18-year-old men, a 17-year-old girl and a 21-year-old female-suffered non-life-threatening gunshot wounds.
March 26: Memphis, Tennessee
The Memphis Police Department said on Twitter that five people were shot dead in Memphis. The tweet stated that three victims were declared dead at the scene, two were taken to the hospital in critical situations, and one of them was taken away in non-critical situations.
Michael Tucker was found dead at a motel in Nashville on Thursday. Police spokesman Don Aaron said Tucker is believed to have died of a gunshot wound.
March 26: Philadelphia
According to CNN affiliate WPVI, the police shot and killed seven people outside the golf and social club. The video released by the police showed that the two suspects were approaching and firing at the gathering crowd.
March 23: Aliceville, Alabama
According to WVTM, an affiliate of CNN, a shooting occurred in a house in Aliceville, resulting in two deaths and two injuries.
March 23: Boulder, Colorado
According to the police, ten people, including Boulder police, were killed in a shooting at a supermarket in Kingsopers.
March 20: Philadelphia
KYW, an affiliate of CNN, reported that one person was killed and five others were injured in a shooting incident at an illegal gathering. The Philadelphia Police Chief Danielle Outlaw said: “At least 150 people fled there and thought they had to flee for their lives.”
March 20: Dallas
According to the police, eight people were shot and killed by an unknown assailant, and one of them was killed.
March 20: Houston
Police said five people were shot dead after a riot in a club. According to KPRC, an affiliate of CNN, one of them was in a critical condition after being shot, while the others were in a stable condition.
March 18: Gresham, Oregon
The police said in a preliminary report that four victims were taken to the hospital after the shooting occurred in the eastern city of Portland.
March 17: Stockton, California
Sheriff San Joaquin said five people were shot while preparing for the night watch in Stockton, California’s Central Valley. No one was injured.
March 16th: Atlanta
Police said that when white gunmen rushed into three hot springs, eight people, including six Asian women, were killed.
CNN’s Christina Walker and Josh Berlinger contributed to this report.