Thousands of protesters gather for another rally at the Taksim square in Istanbul
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Turkey protests: 'Festival atmosphere' in Istanbul

3 June 2013 Last updated at 23:06 BST

Protesters have been involved in confrontations with police for a fourth night.

Thousands of demonstrators gathered in Taksim Square, the focus of the recent protests.

A helicopter, its searchlight shining onto the crowd, hovered overhead and tear gas wafted into the square, reports the BBC's Paul Mason in Taksim Square.