Supporters of Egypt's ousted president Mohammed Morsi marched towards security headquarters in Cairo on Monday night, raising fears of new clashes as the EU's foreign policy chief met local officials, according to the Agence France Presse agency.
The marches came despite a warning from the National Defence Council late Sunday that it would take "decisive and firm action" against demonstrators if they went beyond their right to peaceful protest.
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Addressing an audience in America, the former PM said of Europe's single currency that it was not working "as intended".
The countries lawmakers voted to impeach President Park Geun-hye in the wake of mass protests against her.
The former presidential candidate, who has herself been the target of false news reports, said such stories had 'real-world consequences'.