Turkish police detained at least 11 people overnight as anti-government protests following a suicide bombing blamed on Islamic State turned violent in Istanbul and other cities.
Turkish police fired tear gas and water cannon at hundreds of stone-throwing May Day protesters on Friday, after they defied a ban and tried to march on Istanbul's Taksim Square.
Turkish police shot dead a woman carrying guns and hand grenades and detained a man as they tried to attack Istanbul's police headquarters on Wednesday, officials and media said, the third attack on an official building in the past two days.