Egypt was bracing for a day of violence and protest as supporters and opponents of President Mohamed Morsi prepared for mass rallies following a night of clashes that left three people dead.

Rival demonstrators pitched tents and began sit-ins on Saturday to prepare for Sunday's rallies, a year to the day of Morsi's election. The demonstrations were planned after opponents called for Morsi's resignation and snap elections, which prompted pre-emptive demonstrations on Friday by the Muslim Brotherhood and its allies.

Morsi met the interior minister, Mohamed Ibrahim, and defence minister Abdel-Fattah el-Sisi Saturday to discuss plans to secure strategic locations, the state news agency MENA said.

Al Jazeera's Hoda Abdel Hamid, reporting from Cairo, said the anxiety was palpable.

"This country has been galvanised, focused on June 30. Listening to both sides, you can expect there to be some trouble. Both sides look at this as a matter of survival - the end game. "They feel that whoever has the upper hand will be able to lead the country, even though there is no proof that will happen, that is the mindset at the moment. There is a lot of anxiety among Egyptians." No backdown She added that while Sunday's protests were the focus, others feared about what will come afterwards. "Everything is uncertain in this country. Many people are not so much worried about tomorrow but what happens next if president Morsi does stay in power - and every indication says that he will. "There is no sign the opposition is willing to sit down with the president and there is no sign that the president has any concessions. No one is backing off," our correspondent said. She said it remained to be seen what role the military would take in any trouble. "The army has said it would not sit idle and watch Egypt slip into chaos. Now we don't know what threshold the military has, where it will say enough is enough," Abdel Hamid added. The military has not directly intervened despite fatal attacks on Friday. The offices of the Freedom and Justice Party, the political arm of the Muslim Brotherhood from which Morsi hails, were set on fire in Alexandria and at Aga in Daqahliya. Its offices were stormed in Beheira. Two people were killed in Alexandria, including an American student who was stabbed to death while taking pictures of the clashes, and an Egyptian journalist was killed in Suez Canal city. Morsi's opponents, a collection of leftists, liberals, Christians and also deeply religious Muslims, accuse him of hijacking the revolution and concentrating power in the hands of Islamist groups.

Supporters galvinised