Saudi King Abdullah ordered on Saturday the dispatch of three fully-equipped field hospitals to Egypt, a day after backing Cairo in its deadly crackdown on Muslim Brotherhood protesters.

The move is aimed at "standing by and supporting the brotherly Egyptian people, and to reduce the pressure on hospitals there," said a Saudi official cited by SPA state news agency.

Egyptian authorities insisted Saturday that non-violent members of ousted president Mohammed Morsi's Muslim Brotherhood movement could take part in the country's transition.

"Anyone from the Muslim Brotherhood or the non-Muslim Brotherhood who would like to come back to join the peaceful Egyptian march towards the future will be welcomed," presidential adviser Mustafa Hegazy said.

Turkey's prime minister lashed out Saturday at the international response to the escalating crisis in Egypt, saying organizations including the U.N. and EU should be ashamed of their "inaction."

"Let me say very clearly, the United Nations Security Council no longer has the right to look at itself in the mirror, it's so ashamed, because it couldn't condemn what's happening in Egypt," said Prime Minister Recep Tayyip Erdogan.

Thousands of Arab supporters of the Islamic Movement in Israel demonstrated on Saturday in support of Egypt's ousted Islamist president Mohammed Morsi, an Agence France Presse correspondent said.

Around 4,000 people led by firebrand preacher Sheikh Raed Salah, head of the northern branch of the Islamic Movement, took part in the protest in the northern city of Nazareth, the correspondent said.

Thousands of supporters of Egypt's ousted leader Mohammed Morsi took to the streets in Turkey on Saturday to denounce "massacres" of his loyalists.

Some 4,000 people gathered at a mosque in Istanbul shouting "Down with (army chief Abdel Fattah) al-Sisi" and "Morsi in power!" an Agence France Presse photographer reported.

Lightning and flash floods have killed 50 people in Yemen since Friday, including 27 who died when a torrent washed away a wedding convoy, local officials said Saturday.

Storms have battered the Arabian Peninsula country since Friday, triggering flash floods in several areas that killed 41 people, while nine others, including a soldier, were struck by lightning and died.

A bomb exploded Saturday in front of Egypt's consulate in the eastern Libyan city of Benghazi, causing no casualties but some damage, a security official said.

"Unknown assailants in a vehicle threw an explosive device at the Egyptian consulate in Benghazi without causing casualties," said security spokesman Abdallah al-Zayedi.

The International Committee of the Red Cross said on Saturday it is "extremely concerned" over the health of seven hunger-striking Palestinians held by Israel.

"The ICRC is particularly worried about Imad Abdelaziz Abdallah Al Batran, who has been on hunger strike for several weeks," the ICRC said in a statement.

Egyptian authorities have arrested Mohamed al-Zawahiri, brother of al-Qaida head Ayman al-Zawahiri, for supporting ousted Islamist president Mohammed Morsi, a security source told Agence France Presse on Saturday.

The brother was arrested in his home district of Giza, adjacent to the capital, the source said.

Bahrain's prosecutor has said it has launched a probe into riots at a detention center as an activist said 40 prisoners were wounded as authorities restored order.

Police intervened after guards at the Dry Dock detention center were attacked Friday during an inspection in which they found mobile phones possessed by detainees, BNA state news agency reported the prosecution as saying.