Egypt's Interior Ministry said on Sunday police have detained a Muslim Brotherhood member accused of attacking an opponent of the group in the Nile Delta city of Mansoura, adding that the suspect confessed to being part of a terrorist cell.

The ministry said in a statement that the suspect, Amer Mosaad Abdel-Hamid, confessed to having received – along with other Brotherhood members – military training in Gaza as well as instructions on how to "target state facilities, wreak chaos across the country and disturb public peace and security."

The statement claimed that, since the ouster of Islamist president Mohamed Morsi, Abdel-Hamid and other suspects have opened fire on three anti-Brotherhood rallies in Mansoura.

Following the deadly 14 August dispersal by Egyptian police of the Brotherhood's six-week-long protest camps demanding Morsi's reinstatement, armed attacks erupted against police stations, government buildings, churches and a number of residential areas.

The Egyptian prosecution accused a large number of the Brotherhood's leaders of inciting violence and being members of "terrorist" groups.

Police has since launched an extensive crackdown against the group and its supporters.

The Brotherhood denied any links to the perpetrators.