A New York City plainclothes police officer was seriously injured when he was shot in the head on Saturday while attempting to question a man from his cruiser, and authorities said a suspect had been arrested and was in custody.
Protesters marched against police violence in cities from New York to Denver on Wednesday, and a large demonstration in Baltimore ended peacefully two days after rioting over the death of a black man injured in police custody.
Police hunted for a second day on Friday for suspects in the shooting of two police officers at a protest rally in Ferguson, Missouri, after U.S. President Barack Obama said those responsible must be brought to justice.