The Freedom and Justice Party (FJP) said on Sunday one of the Muslim Brotherhood youth was killed in clashes against the Islamist group’s foes in the Nile Delta city of Damanhour.
“Islam Fathi Masoud was martyred and 60 were injured in an attack on the Muslim Brotherhood’s headquarters with no presence from police forces,” the FJP said on its official Facebook page.
Islam Fathi, a middle school student, was 15 years old.
The clashes between Brotherhood and anti-Brotherhood forces in Damanhour broke out on Saturday evening and left 26 injured, and re-erupted on Sunday evening in Saea Square leading to Fathi's death.
Earlier on Sunday evening, some 1,500 members of the Muslim Brotherhood had organised a rally at the groups headquarters in the square in support of President Mohamed Morsi's controversial Constitutional Declaration.
Anti-Brotherhood protesters who oppose the president's constitutional decrees reportedly clashed with Morsi supporters and the two sides hurled rocks at one at one another amid complete absence of security forces.
Anti-Brotherhood protesters reportedly attacked the Brotherhood demonstration with Molotov cocktails and rocks. The Islamist group responded with rocks and truncheons.
Damanhour is widely regarded to be a Brotherhood stronghold.
A number of attacks on Muslim Brotherhood headquarters have taken place in several cities in the country since the declaration was announced on Thursday.