(AP) — Egypt’s election commission disqualified 10 presidential hopefuls, including Hosni Mubarak’s former spy chief and fundamentalist Islamists, from running Saturday in a surprise decision that left a field of moderates in the race for the country’s first post-revolutionary leader.

The elimination of the three most powerful and controversial candidates could go in two directions with just weeks to go before the vote, observers said. It could plunge the Arab world’s most populous nation into a new political crisis, or just the opposite, defuse it.

Farouk Sultan, the head of the Supreme Presidential Election Commission that was appointed by Egypt’s military rulers to oversee the vote, said that those barred from the contest included Mubarak-era strongman Omar Suleiman, Muslim Brotherhood chief strategist Khairat el-Shater and hard-line Islamist Hazem Abu Ismail. He did not give reasons.

Egypt Bans Top Islamist Candidates From Presidential Election

Khairat el-Shater

Disqualified candidates have 48 hours to appeal the decision, according to election rules. The final list of candidates will be announced on April 26.

The announcement came as a shock to many Egyptians as three of the 10 excluded were considered among the front-runners in a highly polarized campaign that has left the nation divided behind two strong camps: Islamists and former regime insiders who are allegedly supported by the ruling generals.

Thirteen others had their candidacy approved, including former Arab League chief Amr Moussa, moderate Islamist Abdel-Moneim Abolfotoh and former prime minister and Mubarak-era minister Ahmed Shafiq, according to Sultan.

If upheld, the decision would reshape the electoral landscape by removing the most powerful and controversial candidates and leaving moderates such as Abolfotoh, an ex-Muslim Brotherhood leader who has been trying to project crossover appeal for both religious conservatives and liberals, and Moussa, who was a member of the old regime but is popular among middle class Egyptians and who is not so closely associated with it.

The presidential election is due on May 23-24, with a possible runoff on June 16-17. The winner will be announced on June 21, less than two weeks before the July 1 deadline promised by the military rulers who took over after Mubarak to hand over power.

Abu Ismail, a lawyer-turned-preacher whose eligibility had come under scrutiny in recent weeks over the question of whether his late mother had dual Egyptian-U.S. citizenship, accused the military rulers who assumed power after Mubarak’s ouster of trying to manipulate the race from behind the scenes and warned his followers would not stay silent.

“You will drown, God willing, because you are in showdown with the people, because you are playing with fire,” he said in an interview with the Islamist TV network Al-Hakma.

Abu Ismail has led the most aggressive campaign so far. On the eve of the announcement, hundreds of his supporters surrounded the election commission’s headquarters in Cairo, forcing Sultan and his employees to evacuate under the military protection.

Egypt Bans Top Islamist Candidates From Presidential Election

Hazem Abu Ismail (Photo: Al-Arabiya)

A new election law passed after Mubarak’s ouster bars an individual from running if the candidate, the candidate’s spouse or parents hold any citizenship other than Egyptian, and the commission had ordered the Interior Ministry to provide evidence showing whether Abu Ismail’s mother was officially documented in Egypt as having dual U.S. -Egyptian citizenship.

A spokesman for el-Shater’s campaign, Murad Mohammed Ali, also called the decision “very dangerous” and said it gives a message that “there was no revolution in Egypt.”

The Muslim Brotherhood fielded the head of its political arm Mohammed Morsi as a back-up candidate last week, fearing that el-Shater would be disqualified on the grounds that his records were not entirely cleared after serving time in prison in connection with his banned political activity under Mubarak. His lawyers say the ruling generals had dropped the charges. Morsi was not disqualified.

Despite the fiery rhetoric and promises from those disqualified to appeal, some Egyptians welcomed the news.

“This is much better,” said Ahmed Khalil, a spokesman of the liberal Free Egyptians party, which was not fielding a candidate. “These three candidates were holding extremist ideologies or holding an intelligence agenda.”

The announcement was the latest twist in an already convulated political scene as the nation struggles to redefine itself and navigate a difficult transition to civilian rule.

In the last two weeks, a court suspended the work of an Islamist-dominated, 100-member panel tasked with drafting a new constitution on the grounds its makeup violated the spirit of the interim charter that governed its formation.

Islamists as well as the largely liberal and secular activists who spearheaded the protests that led to Mubarak’s ouster had hoped to have a new constitution in place before the election in order to curtail the powers of the president after nearly three decades of autocratic rule.

The Muslim Brotherhood – which along with hard-line ultraconservative Salafis captured more than 70 percent of the parliament seats in the first post-revolutionary elections – announced on March 31 that el-Shater would run for president.

Egypt Bans Top Islamist Candidates From Presidential Election

Mohammed Morsi

That reversed an earlier pledge not to seek the office and came after weeks of complaints by the Brotherhood that the parliament they control is toothless and that the ruling military was preventing it from forming a government.

In what was seen as a countermove backed by the generals, Suleiman made an unexpected announcement a week later that he was entering the race for the presidential elections. Suleiman said he had decided to run to bloc

k Islamist rule and provide stability after more than a year of turmoil.

A judge close to the commission, who spoke on condition of anonymity because he wasn’t authorized to disclose the information, said that Suleiman has not presented the proper number of endorsements. Each candidate needed at least 30,000 endorsements, including at least 1,000 from each of the country’s 15 provinces, to join the race.

His campaign spokesman Mohammed Mishal promised to present extra endorsements that have not been used, giving him a gateway to re-enter the race.

Another campaign spokeswoman Reem Mamdouh said in an interview with the local CBC television network that they had not been officially notified about the decisions but would definite appeal.

“Suleiman will never withdraw and let down the hopes of the large constituency of Egyptians who supported him. This is not happening,” she said.

Ayman Nour, a liberal presidential hopeful, said the commission told him he was disqualified because of his imprisonment as a dissident under Mubarak’s regime and because his name was not listed among registered voters.

He also promised to appeal, saying the decision was “politicized as the whole race is deeply politicized.”