Huge crowds gathered outside Istanbul City Hall for a fourth night of protests over the arrest ... have since spread to more than 55 of Turkey's 81 provinces, sparking violent clashes with riot ...

Turkey was headed for a fourth straight night of protests late Saturday, as the biggest street unrest the country has seen in over a decade raged on over the arrest of Istanbul Mayor Ekrem Imamoglu.

Turkey was headed for a fourth straight night of protests late Saturday, as the biggest street unrest the country has seen in over a decade raged on over the arrest of Istanbul Mayor Ekrem Imamoglu.