The nationwide anti-police brutality protests sparked by the killing of George Floyd in the US have been marked by widespread incidents of police violence, including punching, kicking, gassing, pepper-spraying and driving vehicles at often peaceful protesters in states across the country. The actions have left thousands of protesters in jail and injured many others, leaving some with life-threatening injuries. From Minnesota to New York, Texas, California, Washington DC and many places beyond, from small towns to big cities, police officers have demonstrated just how problematic law enforcement is in the US, drawing condemnation from international groups as well as domestic civil rights organizations. Numerous incidents of police violence have been exposed in disturbing videos and press accounts in recent days. Officers in a police SUV drove at a crowd of protesters in Brooklyn. A police officer was caught on camera violently shoving a woman to the ground during a demonstration. The woman, Dounya Zayer, was taken to hospital and said she suffered a seizure and concussion. An officer yanked a facemask from an African American man who was standing with his hands in the air, then pepper-sprayed him in the face. In Buffalo ... two officers shoved a 75-year-old man to the ground. A video showed the man hitting his head on the ground, causing his blood to spill on the sidewalk. He is now gravely ill in hospital. Frequently journalists have been met with the same aggressive policing as demonstrators. Police attacked journalists "at least 140 times" in the last four days of May. In most cases ... no action has been brought against officers or police departments.