CAIRO Egypt's opposition called Sunday for an investigation into allegations of vote fraud in the referendum on a deeply divisive Islamist-backed constitution after the Muslim Brotherhood, the main group backing the charter, claimed it passed with a 64 percent "yes" vote.
Official results have not been released yet and are expected on Monday. If the unofficial numbers are confirmed, it will be a victory Islamist President Mohammed Morsi, who is from the Brotherhood.
But for many Egyptians, especially the tens of millions who live in extreme poverty, the results are unlikely to bring a hoped for end to the turmoil that has roiled their country for nearly two years since the uprising that ousted authoritarian leader Hosni Mubarak.
The opposition allegations look likely to prolong the struggle that has exploded in deadly street violence at times over the past month, ensuring that stability will remain elusive.