Demonstrations continued across the United States on Sunday as the nation braced for another grueling night of unrest over police shootings and the death of George Floyd, amid growing concern that aggressive law enforcement tactics intended to impose order were instead inflaming tensions.

Videos showed police officers in recent nights using batons, tear gas, pepper spray and rubber bullets on protesters, bystanders and journalists, often without warning or seemingly unprovoked. The footage, which has been shared widely online, highlighted the very complaints over police behavior that have drawn protests in at least 75 cities across the United States.

In Salt Lake City, officers in riot gear shoved a man with a cane to the ground.

In Brooklyn, two police S.U.V.s plowed into a crowd of protesters.

In Atlanta, police officers enforcing a curfew stopped two college students in a car, fired Tasers on them and dragged them out of the vehicle.

And in Minneapolis, where there have been six consecutive nights of protests and clashes, a video appeared to show officers yelling at people on their […]