Supporters of Egypt\'s ousted president called for new protests on Monday, threatening to deepen the country\'s crisis as the EU foreign policy chief held talks with the government and opposition. The Anti-Coup Alliance of Islamist groups organising protests against the ouster of president Mohammed Morsi urged demonstrators to march on security buildings on Monday night and called a million-man march for Tuesday. Their statement came after the National Defence Council warned on Sunday that it would take \"decisive and firm action\" against demonstrators if they went beyond their right to peaceful protest. Tensions were running high after the deaths of 72 people at a pro-Morsi rally in Cairo on Saturday. \"We call for a million person march under the banner of \'Martyrs of the Coup\' on Tuesday,\" the Anti-Coup Alliance said in a statement. The group urged Egyptians \"to go out into the streets and squares, to regain their freedom and dignity - that are being usurped by the bloody coup - and for the rights of the martyrs assassinated by its bullets.\" It also called for protesters to march on security buildings across Egypt on Monday night \"to condemn the criminal acts and the firing of live ammunition by the interior ministry at peaceful demonstrators.\"