Ahmed Shafiq, the Egyptian prime minister, has said that "stability" was returning to Egypt on Saturday, but tens of thousands of protesters in Cairo's Tahrir Square continue to demand that President Hosni Mubarak step down.

In the latest reaction to the protests from the ruling party, its top leadership resigned en masse, including Gamal Mubarak, the son of the president.

Al Jazeera's Alan Fisher has more.