Muslim Brotherhood (MB) loyalists blocked traffic in Al Matareya suburb, east of Cairo, burning trash cans and car tires, a police source told Al Bawaba News Friday. The MB protesters chanted slogans against the police and military forces and threw stones and fireworks on police personnel, the source added. Security forces were deployed to the scene to break up the demonstrations as unauthorized protesting is illegal in Egypt according to a Protest Law issued in Sep. 2013 by then interim authorities following a series of deadly blasts.