Fresh clashes between security forces and protesters erupted around Cairo's Tahrir Square on Sunday morning as violence continued for a second day.

Demonstrators hurled missiles, while police in riot gear let off rounds of tear gas, amid scenes reminiscent of the February uprising in the Egyptian capital.

At least two people were killed and some 750 injured in the violence on Saturday, with clashes also taking place in cities outside Cairo.

A Kentucky Fried Chicken outlet on Tahrir Square which served as a makeshift clinic in February was again used as a treatment point, with the injured being tended to on the street outside.

The Egyptian military has promised to hand power to an elected government, but has yet to specify a date for presidential elections. Protesters say the generals are trying to cling on to power.

Tear gas canisters and rubber bullets littered the streets, along with stones and bits of broken masonry thrown by the demonstrators.

Some protesters picked up tear gas canisters fired by the police and threw them back.

A few activists formed a human shield in front of police lines to try to prevent their comrades attacking officers.