Sunday's clashes in Egypt's Fayoum governorate involving Muslim Brotherhood members and supporters were instigated by "remnants" of the former regime and not by anti-government 'Rebel' campaigners, Ahmed Ibrahim Bayoumi, a member of the Brotherhood's higher board, said on Monday.

The clashes, which took place Sunday night in Egypt's central Fayoum governorate, were initially thought to have pitted Brotherhood members against anti-government 'Rebel' campaigners.

''Rebel campaigners were there, but they didn't physically attack us,'' Bayoumi told Al-Ahram's Arabic-language news website.

In a statement, Bayoumi claimed to know the names of those who instigated the violence, but refused to name them until police had conducted full investigations of the incident.

''There are those who use the 'Rebel' name to sow chaos and give their actions a political cover,'' Bayoumi asserted.

Clashes erupted when Brotherhood members and supporters were marching in a show of support for Fayoum's newly-appointed regional governor. In the ensuing violence, more than 50 people were injured.

In a conference on Saturday, President Mohamed Morsi – who hails from the Muslim Brotherhood – accused ''remnants of the former regime'' of attempting to ''drag the country into chaos.''

Unlike Bayoumi, however, Morsi failed to distinguish between "remnants" of the former regime and Egypt's 'Rebel' campaign.

The 'Rebel' initiative aims to collect 15 million citizens' signatures, outnumbering the roughly 13.2 million votes Morsi garnered during Egypt's first free presidential elections one year ago.

'Rebel' campaigners are calling for mass demonstrations on 30 June to demand Morsi's ouster and snap presidential polls.