"The Organization of Islamic Cooperation and all international institutions should take a swift, serious and firm action to put an end to this genocide in Myanmar," Ruhollah Beigi said on Saturday.
He noted that meaningful silence of the UN and other international bodies toward crimes committed by the extremist Buddhists has led to widespread massacre of oppressed Rohingya Muslims in Myanmar.
He underscored that all Muslim nations across the world are duty-bound to defend Muslims in Myanmar, and added, "The catastrophe in Myanmar is not only an issue for the Muslim world, but an issue for all free and justice-seeking peoples of the world."
The government of Myanmar refuses to recognize Rohingyas, who it claims are not natives and classifies as illegal migrants, although the Rohingya are said to be Muslim descendants of Persian, Turkish, Bengali, and Pathan origin, who migrated to Burma as early as the 8th century.
Even Myanmar's so-called democracy icon Aung San Suu Kyi has kept quiet on the atrocities committed against the Rohingya Muslims.
Myanmar's President Thein Sein said Rohingya Muslims must be expelled from the country and sent to refugee camps run by the United Nations.
The UN says decades of discrimination have left the Rohingyas stateless, with Myanmar implementing restrictions on their movement and withholding land rights, education and public services.
Since June, hundreds of members of the nearly-one-million-strong Rohingya Muslim minority have been killed and tens of thousands of others among them have been displaced in the west of the country due to a wave of communal violence.
Over the past two years, waves of ethnic Muslims have attempted to flee by boats in the face of systematic oppression by the Myanmar government.