Ahmadinejad brands US world's dictator ahead of summit

"They are the self-proclaimed leaders and everybody should know that self-proclaimed leadership is dictatorship," Ahmadinejad, referring to the United States, told an audience of hundreds at the Iranian embassy in Abuja.

"The era of dictatorship is over," he added through an official translator.

The Iranian leader, whose country was recently hit with new sanctions by Western nations over its nuclear programme, said "the occupiers ... should dismantle their evil forces from the face of earth."

Ahmadinejad's appearance in the West African country, where Muslims make up an estimated half of the 150 million population, drew a rapturous welcome from the crowd, which chanted "Nigerians support Iran."

"We are going to put an end to the suffering of the people of Palestine," he said. "The Palestinian refugees will return to their homeland ... soon we are going to celebrate our victory."