The Islamic summit decided on Thursday to take the issue of Myanmar's Muslim Rohingyas, displaced by deadly sectarian violence, to the United Nations.
At a meeting in the holy city of Mecca the 57-member Organisation of Islamic Cooperation (OIC) condemned "the continued recourse to violence by the Myanmar authorities against the members of this minority and their refusal to recognise their right to citizenship."
"The summit has decided to bring this matter before the General Assembly of the United Nations," it said in a final statement.
The OIC announced on Saturday before the summit that it had received a green light from Myanmar to assist displaced Rohingya.
It said Myanmar gave its agreement following talks in the capital Yangon on Friday between a delegation from the pan-Islamic body and President Thein Sein on the "deplorable humanitarian situation in Rakhine state."
The delegation assured Thein Sein that Islamic humanitarian organisations were willing to provide aid to all residents of the strife-torn state.
Saudi King Abdullah decided Saturday to grant $50 million to the Rohingya, the country's news agency SPA reported, describing them as victims of "several rights violations, including ethnic cleansing, murder, rape and forced displacement."
Violence between Buddhists and Rohingya has left scores dead, with official figures indicating that 80 people from both sides died in initial fighting in June.
The entire state has been under emergency rule since early June with a heavy army and police presence.