Saudi Arabia has delivered $50m in aid to the Rohingya Muslim minority in Myanmar who are said to be victims of ethnic cleansing.
King Abdullah has called an "Islamic Solidarity Summit" to be held in Mecca efore the end of the Ramadan to discuss the "brutal attacks" made against Muslims in the western state of Rakhine. The heads of state of 57 Muslim countries have been invited to the meeting.
In another development, hackers broke into the website of the Myanmar's Information Ministry and posted a message warning the government to "stop the killing of Muslims".
"Those Muslims have a message of peace to the world but you are killing them," read the message. "If you continue, we will target all the worshippers of Buddha everywhere in the world and your country will be a hell".
Myanmar opposition leader Aung San Suu Kyi has held talks with President Thein Sein. In her first parliamentary speech last month, Suu Kyi, who was released from house arrest following a controversial election in November 2010, called for a legislation to protect the rights of the nation's ethnic minorities.
She warned that the "flames of war are not completely extinguished" in the country. However, many human rights campaigners criticised Suu Kyi for dodging the subject of the Rohingya when asked directly.
The Rohingya have never been granted Burmese citizenship and a 1982 law excluded from the list of officially recognised minorities.
"It's disappointing. She is in a difficult position but people have been disappointed she hasn't been more outspoken," said Anna Roberts, executive director of the Burma Campaign UK.
"She passed up opportunities to say good things on this," said Brad Adams, Asia director of Human Rights Watch.
Thein Sein has invited the Saudi-based Organisation of Islamic Cooperation (OIC), which urged the international community to take action to stop the massacres. people displaced.