A security source at the interior ministry said on Tuesday that authorities have arrested four "terrorist cells" formed by members of the Muslim Brotherhood who have lately targeted police personnel, Al-Ahram's Arabic news website reported.
The cells were detained in the Egyptian cities of Damietta, Alexandria, Daqahliya and Ismailiya, according to the source who spoke on condition of anonymity.
According to investigations, many of the detained cell members were involved in vandalism and illegally possessed weapons.
Some of the detainees confesesd during the investigations that they participated with other members to set fire to police vehicles in Damietta.
The security source added that police officers in Alexandria said the cells had the intention to revive the Brotherhood's military wing under the title of "Groups of Quality Operations" to target police and military personnel.
The Brotherhood was labeled a terrorist organisation in February and has been blamed for militant attacks since the ouster of president Mohamed Morsi – a longtime member of the group – in July 2013.
The attacks have mainly targeted security forces and the military in the Sinai Peninsula.
However, the Brotherhood has repeatedly condemned the attacks and denied responsibility for them.