Mahmoud Ahmadinejad has defended his "completely free" re-election as Iran's president, amid violent clashes on the streets over claims of election fraud.
Mr Ahmadinejad condemned the outside world for "psychological warfare" against Iranians during the election.
Thousands have protested against the result, burning barricades on the streets of Tehran and clashing with police, who responded with tear gas.
Reformist candidate Mir Hossein Mousavi urged his supporters to avoid violence.
'Down with the dictator'
Speaking on national television, Mr Ahmadinejad praised the Iranian people for choosing to "look toward the future" rather than returning to the past.
President Ahmadinejad addresses the nation
"This is a great victory at a time and condition when the whole material, political and propaganda facilities outside of Iran and sometimes... inside Iran, were total
mobilised against our people," he said.
He blamed "foreign media" for instigating a "full-fledged fight against our people".
"Nearly 40 million people took part in a totally free election," he said.
Mr Ahmadinejad is set to hold a press conference on Sunday, followed by a huge rally.
BBC Iranian affairs analyst Sadeq Saba says the margin of the win was so wide that it made a lot of people suspicious.