Tear gas was again fired on Saturday at protesters in Istanbul and Ankara.
In a defiant speech, PM Recep Tayyip Erdogan insisted that the park project would go ahead.
He also said that police would remain in Taksim Square to preserve order.
Correspondents say that what began as a local issue has
spiralled into more widespread anger at the government and ruling
Justice and Development (AK) Party.
Transport lockdown
Hundreds of demonstrators marched over the bridge connecting
the Asian and European shores of Istanbul on Saturday morning to try to
reach the main square.
Police fired tear gas to try to disperse them and some protesters threw rocks.
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