BBC: The constitutional court in Turkey has annulled last Friday's parliamentary vote to elect a new president.
The only candidate, Foreign Minister Abdullah Gul, failed to win the required majority after a boycott by secularist opposition parties.
The parties, which accuse Mr Gul of a hidden Islamist agenda, asked the court to rule that there was no quorum.
The government says despite the ruling it will try to achieve a quorum with a new vote on Wednesday. Turkey's presidency vote annulled (Read on)
Mark Alexander
