Demonstrations across Turkey were ignited by a violent police crackdown on a peaceful sit-in to prevent the uprooting of trees at Istanbul's Taksim Square.
In these AP images, Turkish protesters clash with riot police as smoke rises in the darkness near the former Ottoman palace, Dolmabahce. In Taksim Square, a street vendor sells umbrellas in front of overturned police cars. Thousands march in the square, waving flags and banners in a sea of people.
Here are images from the protests: