The shootings in Savannah, Georgia; Austin, Texas; Cleveland; and Chicago left six dead and 33 injured.
The police in Austin, Texas, said 14 people were injured, with two in critical condition. Most of them seemed to be bystanders, the police said.
Earlier this week, the Senate unanimously passed legislation designating Pulse, a gay nightclub in Florida, a national memorial.
With 225 mass shootings by the end of May, the US is on track to have more mass shootings in 2021 than any recent year on record.
"Several times during the relationship he became intoxicated, enraged and forced himself on me sexually," she wrote.
The ALERRT Center trains law enforcement, first responders, and civilians how to "avoid, deny, defend," and "stop the bleed" during a shooting.
Police say Cassidy killed himself after opening fire at a Valley Transportation Authority rail yard in San Jose, killing 9 people.
President Joe Biden released a statement on Wednesday evening, urging Congress to take action on gun control.
Prosecutors allege Ahmad Al Aliwi Alissa opened fire at King Soopers grocery store, killing 10 people including a police officer.
Police said the suspect entered the mobile home where the party was taking place and began shooting.
Local reporters said Monday morning that Stephen Broderick had been taken into custody near Manor, Texas, a suburb east of Austin.
Eight victims were pronounced dead at the scene of the shooting Thursday night after a gunman opened fire at a FedEx facility in Indianapolis.
Eight people died in the shooting at the FedEx facility on Thursday night, and several others were injured.
Abbott is promoting a "Second Amendment Sanctuary State" bill which would allow Texas to ignore federal gun laws.
Police identified Ahmad Alissa, 21, as the suspect in the mass shooting in Boulder, Colorado. His brother said he was bullied in high school.
Just 10 US states and Washington, DC, have laws requiring some sort of waiting period before a person is allowed to purchase a gun.
An expert told Insider that he would "absolutely not" recommend that a civilian enter an active-shooter scene and livestream it.
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