Supporters and opponents of deposed Egyptian President Mohamed Morsi have called for rival demonstrations on Sunday, after the deadliest violence in weeks left four people dead Friday.
Al Jazeera reported that the Anti-Coup Alliance called on Saturday for its supporters to try to reach Cairo's Tahrir Square on Sunday, October 6, to mark the 40th anniversary of the 1973 war known as the October war in the Arab world and the Yom Kippur war in Israel.
The Egyptian authorities on Saturday issued a warning to anyone considering marching on the anniversary.
"The Ministry of Interior asserts its determination on confronting violence and infringements of the law by Muslim Brotherhood supporters," a ministry statement said.
"Security has been stepped up on highways, in all cities and at important installations.
"The Ministry of Interior warns against attempting to spoil the 6th of October commemoration."
The military has significantly boosted its presence around Tahrir Square after the clashes on Friday that spread across several cities.
Despite these warnings, the Anti-Coup Alliance, which is comprised of both Morsi supporters and other groups that oppose the way the military deposed Morsi and took control of Egypt, has urged its supporters to take to the streets.
"The Egypt Anti-Coup Alliance repeats its call to all Egyptians to continue their protests in every part of Egypt, and to gather in Tahrir Square on Sunday, October 6, to celebrate the army of that victory and its leaders," the group said.
Calls for demonstrations on Sunday were also made by Tamarod, the movement which led nationwide protests against Morsi that finally led to his ouster by the army.
"We call all Egyptians to come out tomorrow across all squares in the country to assert that this nation will not allow its revolution to be stolen," prominent Tamarod leader Mahmoud Badr told reporters.
Al Jazeera's Cairo correspondent said that the demonstrations would start from five different spots around Cairo, and planned to converge on Tahrir Square in the afternoon.