Turkey's Erdogan defends Istanbul election re-run amid protests
Protests have erupted across Istanbul over the decision to re-run the election
Istanbul's mayoral election was affected by "organised crime and serious corruption", Turkish President Recep Tayyip Erdogan says.
Mr Erdogan was defending the decision to re-run the 31 March vote, which returned a slim win for the opposition.
Opposition candidate Ekrem Imamoglu, who has been stripped of his duties, described the move as "treacherous"
More:Turkey's Erdogan defends Istanbul election re-run amid protests - BBC News