Turnout in the second round was reported to be low
Egypt's ruling military
has issued a declaration granting itself sweeping powers, as the country
awaits results of presidential elections.
The document by the Supreme Council of Armed Forces (Scaf)
says new general elections cannot be held until a permanent constitution
is drawn up.
It also gives the Scaf legislative control.
Meanwhile, the Muslim Brotherhood says its candidate, Mohammed Mursi, has won Sunday's presidential election.
Mr Mursi, an Islamist, is competing against Ahmed Shafiq, who served as prime minister under former President Hosni Mubarak.
Mr Mursi's Muslim Brotherhood said he was holding a 52%-48%
lead over Mr Shafiq with almost all the vote counted after Sunday's
second-round run-off election.
A pro-Brotherhood TV station said Mr Mursi had won over 13m
votes, and state TV reported that he was ahead in preliminary results.
Speaking at his party headquarters, Mr Mursi pledged to be a
president for all Egyptians, adding that he would not "seek revenge or
settle scores".
"Thanks be to God who has guided Egypt's
people to the path of freedom and democracy, uniting the Egyptians to a
better future," he said.
But Mr Shafiq's campaign said it rejected "completely" the victory claim by Mr Mursi.
"We are astonished by this bizarre behaviour which amounts to
a hijacking of the election results," Shafiq campaign official Mahmud
Barakeh was quoted as saying by the AFP news agency.
Official results from the Higher Presidential Election Commission (HPEC) will be announced on Thursday, state TV reported.
The election - the first since Hosni Mubarak was forced from
office in 2011 - also comes amid a bitter row over the dissolution of
parliament following a court ruling on Thursday.
The Brotherhood has denounced the step as unlawful and a coup against democracy.
'Grave setback'
The Scaf issued its declaration late on Sunday - just hours after the polls closed.
The document effectively gives the Scaf
control over the budget and who writes the permanent constitution
following mass street protest that toppled Mr Mubarak, reports say. It
also strips the president of any authority over the army.
The full details of the declaration are expected to be announced later on Monday.
However, prominent political leader Mohammed ElBaradei
already described the document as a "grave setback for democracy and
revolution".
The Brotherhood earlier urged Egyptians to protect their
revolution after the Scaf declared the parliament null and void on
Saturday.
Two days earlier, the Supreme Constitutional Court ruled that
last year's legislative polls were unconstitutional because party
members were allowed to contest seats in the lower house reserved for
independents.
The decision was made by judges appointed under Mr Mubarak.
The dispute has laid bare the fears of some that the military
council is trying to consolidate power and resist the democratic
changes demanded during last year's demonstrations.
Soldiers have already been stationed around the parliament with orders not to let MPs enter.
Law and order
Polls began closing at 22:00 (20:00 GMT), after voting was extended by two hours.
Turnout appeared to be down compared to the first round.
The BBC's Jon Leyne says that there was less enthusiasm in
the run-off election than there was for previous rounds of voting, and
some have called for a boycott or spoiled ballots.
Many voters have expressed scepticism at the choices they face, and have voted with reluctance.
"Boycotting the elections is not a practical solution because
at this point one of the two candidates will win anyway," Saber
Abdullah, voting in Alexandria, told the BBC.
"I demand the next president to concentrate on helping the
youth because the old regime have ignored them to the extent that they
have reached rock bottom."
Mr Shafiq has campaigned on a platform of a return to
stability and law-and-order which, correspondents say, many find
attractive after months of political turmoil.
But to his critics, the former air force officer is the
army's unofficial candidate and a symbol of the autocratic days under
Mubarak.
Mr Mursi, meanwhile, has cast himself as a revolutionary and
part of the movement that overthrew Mubarak, and has promised economic
and political reform.
He has also softened his religious stance in an attempt to attract liberals and minorities.
Mr Shafiq came second in last month's first round, in which
turnout among the 52 million eligible voters was only 46%. Official
results gave Mr Mursi 24.8% and Mr Shafiq 23.7%.