(File image) Egyptian President Mohamed Morsi

Cairo - Egypt's Islamist president ordered changes to the military top brass on Sunday, including pensioning off Field Marshal Hussein Tantawi who served Hosni Mubarak for two decades, in a move that further stamps the new leader's authority on the state.

President Mohamed Morsi also cancelled a constitutional declaration that limited presidential powers and which the ruling army council issued in June, as voting in the election that brought Morsi to power drew to a close.

There had previously been much debate over the fate of 76-year-old Tantawi, who had ruled Egypt as head of the military council after Mubarak was toppled last year, but the timing of the announcement to replace him was a surprise.

The move sidelines Tantawi, whose presence had cast a shadow over Morsi's rule, and appeared to whittle away at the remaining powers of the military, from whose ranks every president for 60 years had been drawn until Morsi's election.

“Field Marshal Hussein Tantawi has been transferred into retirement from today,” presidential spokesperson Yasser Ali said in a statement, appointing in his place as armed forces chief and defence minister General Abdel Fattah al-Sisi.

Morsi also ordered Chief of Staff Sami Enan to retire and appointed General Sidki Sobhi in his place. Both Tantawi and Enan were appointed advisers to Morsi.

“The decision was sovereign by the president to pump new blood into the military establishment for the sake of developing the new, modern state,” spokesperson Ali told Reuters after making the announcement.

Army General Mohamed el-Assar, who was appointed deputy defence minister in the changes, said the decision had been taken in consultation with Tantawi and the rest of the military council.

In further changes, Morsi appointed a judge, Mahmoud Mekky, as his vice-president. Mekky is the brother of the newly appointed justice minister, Ahmed Mekky, who had been a vocal critic vote rigging under Mubarak.

“This clash between the new president and the military council was expected but not this fast,” said analyst Gamal Soltan. - Reuters