Fierce clashes erupted Sunday between Egyptian Muslim Brotherhood (MB) members and its opponents outside its office in the Nile Delta city of Damanhour.

Fierce clashes erupted Sunday between Egyptian Muslim Brotherhood (MB) members and its opponents outside its office in the Nile Delta city of Damanhour, leaving one MB member killed and 60 others injured, the Freedom and Justice Party (FJP), MB's political arm said.

The clashes first broke out on Saturday evening, injuring 26, and renewed Sunday evening, during which a 15-year-old MB member named Islam Fathi Masoud was killed.

As a stronghold of MB, Damanhour has witnessed repeated clashes between MB members and protesters, during which stones were hurled and Molotov cocktails were used.

Egypt has seen a nationwide protest against the MB and President Mohammad Mursi, who issued a new constitutional declaration on Thursday, granting him the absolute power in his country.

According to the new constitutional declaration, all laws, decrees and constitutional declarations issued by the president since Mursi came to office on June 30, 2012, are final and unchallengeable by anybody.

As for the Constitutional Assembly, the declaration noted that the new draft constitution will be formed within a maximum period of eight months, instead of six, from the date of assembly's formation, i.e. until February 2013.

Meanwhile, no judicial body is entitled to dissolve the Shura Council (upper house) or the Constituent Assembly, the declaration stated.

But after violent protests over the weekend, the presidency announced Sunday that the constitutional declaration issued by Mursi is temporary rather than permanent.