JERUSALEM, Israel -- Egyptian authorities postponed announcing results of the presidential election Thursday, citing complaints of voter fraud by both candidates.
The Election Commission said a panel of judges would need time to examine an estimated 400 complaints before the winner could be announced, possibly Saturday or Sunday.
Early Monday, the Muslim Brotherhood declared its candidate, Mohammed Morsi, the winner, with 52 percent of the vote, while former Prime Minister Ahmed Shafiq said he'd won at least 51.5 percent.
The Brotherhood's leaders have warned that its supporters would initiate street protests if Shafiq is declared the winner.
Meanwhile, Shafiq submitted claims that thousands of pre-marked ballots were delivered to at least 14 of 27 polling stations staffed by officials backing the Brotherhood.
So far, authorities have arrested three polling station heads suspected of vote tampering, The Associated Press reported.
Earlier this week, thousands flocked to Cairo's Tahrir Square in response to the Brotherhood's call to stage demonstrations against the Supreme Council of the Armed Forces, slated to turn over control of the government on July 1.
The council recently announced steps to dissolve the parliament and assume legislative powers that include control of the state budget and choosing members of the committee to rewrite the constitution.
While Egypt waits to see who will be its next leader, ousted President Hosni Mubarak, 84, remains comatose in a military hospital.
Mubarak was recently sentenced to life in prison for his role in the deaths of protesters during last year's uprising. He was transferred to the hospital from prison after suffering a series of strokes.
According to media reports, his heart and vital organs were functioning normally after he was taken off life support, though he still needed help with breathing.