Turkish police have moved in to disperse hundreds of protesters, who had gathered in and around Istanbul’s landmark Taskim Square.
They were trying to get into the nearby Gezi Park. A plan to redevelop the area recently sparked nationwide anti-government protests.
Police used tear gas and water cannon in a bid to break up the crowds.
Protest organisers had planned to break through police cordons – to serve notice to authorities of a court decision which has annulled the redevelopment proposals.
The park has been officially closed since mid June, when police cleared demonstrators who had occupied it amid the anti-government action.