The Muslim Brotherhood's Mohammed Mursi is declared the winner of Egypt's presidential run-off, prompting wild celebrations in Cairo's Tahrir Square. He won 51.73% of the vote, beating former Prime Minister Ahmed Shafiq, the Higher Presidential Election Commission said.

The head of the panel of judges, Farouq Sultan, said it had upheld some of the 466 complaints by the candidates, but that the election result still stood.

The announcement prompted scenes of jubilation in Cairo's Tahrir Square, where Mr Mursi's supporters gathered.

They have been maintaining a vigil there for days in protest at the series of decrees by the ruling Supreme Council of the Armed Forces (Scaf) which they say are designed to reduce or constrain the power of the president, and entrench the power of the military.

"Down with military rule" they chanted amid wild cheering and explosions of firecrackers.

Across Cairo, cars sounded their horns amid crowds chanting "Mursi, Mursi".