World
Riot police in Turkey have used tear gas and water canon to prevent demonstrators defying a ban on protests on Istanbul's central Taksim Square. Local media showed footage of flag-waving protesters confronting a wall of riot police Thousands of people have been massing at different spots across the city, the Associated Press news agency said. Many vowed to defy the ban. Turkish media said some 40,000 police would be deployed in the city on 1 May.
Background:
Tear gas at Turkish May Day protests [BBC]
Turkey: Police fire tear gas to block May Day protesters in Istanbul [euronews]
