Rival parties warn of fraud in Turkey's key local elections

ANKARA (Reuters) - The anger, threats and conspiracy theories in Turkey's election campaign have prompted both sides to warn about ballot abuse, with the main opposition saying it alone plans to deploy half a million poll observers.

Prime Minister Tayyip Erdogan's embattled ruling AK Party is expected to follow suit, with at least one of its prominent candidates warning of "vanishing ink" on ballots.