Egyptian security forces failed to stop revenge attacks against Coptic Christians after a deadly crackdown on supporters of ousted Islamist president Mohamed Morsi in August, Amnesty International said on Wednesday.

The London-based rights group said attacks targeted Christian churches, schools and charity buildings after the August 14 dispersal by security forces of two pro-Morsi camps in Cairo that killed hundreds of people.

A jihadist group on Tuesday claimed responsibility for an attack on a Cairo satellite communications dish it said was an "infidel mouthpiece" of Egypt's military-installed authorities.

On Monday assailants fired rocket-propelled grenades at the dish in Cairo's upscale Maadi district, a day after clashes between Islamists and the security forces killed at least 57 people in Egypt -- 48 of them in the capital alone.

Egypt's cabinet on Tuesday ordered authorities to remove the Muslim Brotherhood from the list of approved non-governmental organizations following a judicial order, state media reported.

The move comes after an Egyptian court last month banned the Muslim Brotherhood from operating and ordered its assets seized, amid a massive crackdown on the group following the military ouster of Islamist president Mohammed Morsi.

The death toll from weekend clashes between Islamists and police in Egypt has reached 57, a health ministry official said on Tuesday.

Khaled al-Khatib said 48 people died in Cairo and nine in other parts of the country. Authorities had previously given a toll of 51.

Jordan's King Abdullah II urged Egyptians to make choices about their future that will bring about unity, in remarks during talks Tuesday with the troubled country's interim president, the palace said.

"Jordan supports choices the people of Egypt make about their future that would enhance their national unity, stability and security," it quoted the king as telling Mansour Adly, who was in the kingdom as part a regional tour.

Egypt's interim president Adly Mansour won fresh support from King Abdullah for his country's fight against "terrorism" as he Tuesday wound up a trip to Saudi Arabia, official news agency SPA said.

Mansour arrived Monday in the Red Sea city of Jeddah on his first official trip abroad since he replaced the Islamist Mohammed Morsi after the army deposed him on July 3.

Two Canadians released from an Egyptian prison more than a month after their arrest during violent protests have been prevented from leaving the country, their lawyer said on Monday.

Filmmaker John Greyson and emergency room doctor Tarek Loubani had been prevented from boarding a flight at Cairo airport after their release on the weekend, said the lawyer.

The United States on Monday blacklisted as a terrorist an Egyptian Islamist military commander with links to al-Qaida, accusing him of setting up training camps in Egypt and Libya.

The State Department also designated as global terrorists the group founded by Muhammad Jamal, who had learned bomb-making techniques when he trained with al-Qaida in Afghanistan in the 1980s

Progressive Socialist Party leader MP Walid Jumblat on Monday slammed Syrian President Bashar Assad as a “schizophrenic person” and noted that “terrorist groups” infiltrated Syria due to the “collusion and inaction” of the international community.

“Forty years since the October War, which was an important juncture in the course of the Arab-Israeli conflict, one ponders over the unprecedented developments that the Arab world is witnessing and the distressing tragedies that it is going through during this political moment, as the cases of chaos and armed conflicts exacerbate and people alone pay hefty prices only because they have demanded the minimum of their humanitarian and political rights,” Jumblat said in his weekly editorial in the PSP's al-Anbaa.

Egypt's military-backed interim president Adly Mansour arrived in Saudi Arabia Monday to thank the kingdom, the first country to welcome the July military ouster of his Islamist predecessor Mohammed Morsi.

Saudi Arabia, which along with other Gulf monarchies has long seen Morsi's Muslim Brotherhood as a threat, embraced his July 3 overthrow and quickly pledged financial aid to the military-backed authorities.