Egypt's interim leader has outlined
his timetable for new elections, amid continuing unrest in the country.
Adly Mansour's decree envisages changes to the Islamist-drafted constitution
and a referendum, which would pave way the way for elections early next year.
This comes as at least 51 people were killed in the capital Cairo.
The Muslim Brotherhood says its members were fired on at a sit-in for ousted
President Mohammad Morsi. The army says it responded to an armed
provocation.
Mr Morsi, an Islamist and Egypt's first freely elected
leader, was removed from office by the army last week after mass protests.
His supporters accuse the military of staging a coup, but his opponents say
the move is the continuation of the revolution that deposed President Hosni
Mubarak in 2011.
Protests
Mr Mansour issued the decree late on Monday.
It says that a panel to amend the constitution - which was suspended last
week - would be formed within 15 days.
The changes would then be put to a referendum - to be organised within four
months.
This would lead to parliamentary elections - which could be held early in
2014.
Finally, presidential elections would be called once the new parliament
convenes.
The Muslim Brotherhood has so far made no public comment on the proposed
timetable.
Mr Mansour's move comes amid continuing mass protests by both supporters and
opponents of Mohammad Morsi.
Spokesman for the Egyptian ministry: "There was a treacherous
attack"
The situation will have to improve radically if Mr Mansour's timetable for
elections is not to prove hopelessly unrealistic, the BBC's Jim Muir in Cairo
reports.
In the meantime, the focus will remain on trying to prevent another explosion
of violence and to agree on an interim prime minister to form a transitional
government to stabilise the country and prepare for elections.
Meanwhile, the United States has condemned the violence in Egypt, calling for
"maximum restraint".
A White House statement said Washington was "not aligned" with any political
movement, adding that cutting military aid to Egypt was not in US
interests.
'Assassin and butcher'
There were conflicting reports over what happened outside the Presidential
Guard barracks in Cairo on Monday morning.
The Muslim Brotherhood put the number of dead at 53, and said children were
among the victims.
It said the army raided its sit-in at about 04:00 (02:00 GMT) as protesters
were praying.
Later, in an emotional news briefing, members of the Muslim Brotherhood
accused military chief Gen Abdul Fattah al-Sisi of being "an assassin and a
butcher".
The health ministry said at least 51 people were killed and 435 people
wounded.
Speaking to journalists, army spokesman Col Ahmed Mohammed Ali said a group
armed with live ammunition, petrol bombs and stones had attacked security
forces.
He said that two police and one soldier were killed in the exchange of fire.
Eight soldiers were critically wounded.
The spokesman added that one soldier had been shot through the top of the
head from above, indicating that snipers were firing from high buildings.
Col Ali also disputed claims that children had died, saying pictures of dead
children posted on the internet were in fact images taken in Syria in March.
Mr Morsi is believed by the Muslim Brotherhood to be held at the barracks,
but the military says he is elsewhere.
