CAIRO - Egypt's Muslim Brotherhood, whose political party propelled the nation's president to power, called for a nationwide peaceful demonstration on Friday to condemn insults to Prophet Mohammad, a senior official said on Wednesday on the group's website.

The statement followed a protest in Cairo on Tuesday in which some demonstrators scaled the US embassy walls and tore down the American flag over a film they blamed on the United States. The Egyptian government called the assault unjustified and said the US government could not be held responsible.

In Libya, Islamist gunmen killed the US ambassador in an attack on the Benghazi consulate prompted by the film.

Brotherhood secretary-general Mahmoud Hussein called for a "peaceful protest to condemn insults to religious convictions and insults to the Prophet", adding it would start after noon prayers on Friday in front of main mosques across Egypt.

The group called for all Egyptian groups to join in. Egyptian President Mohammad Morsy rose to power through the Brotherhood, although he formally resigned from the group on taking office.

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