Cairo: Egypt's army is "preventively" holding ousted president Mohammad Mursi after his ouster by an army decree, a senior army official told AFP Thursday.
"He is being held preventively for final preparations," the official said, suggesting Mursi might face formal charges over accusations made by his opponents.
Mursi was detained along with senior aides after issuing a defiant call for supporters to protect his elected "legitimacy", in a recorded speech hours after the military announced he had been ousted Wednesday.
"We had to confront it at some point, this threatening rhetoric," the military official said.
"He succeeded in creating enmity between Egyptians," the official said.
At least 50 people were killed in clashes in the days leading to massive protests on June 30 calling for his departure.
That prompted the army to issue the president a 48-hour ultimatum to find an agreement with the protesters.
Mursi has been summoned for questioning by a court over his escape, along with other inmates, from prison during the revolt that overthrew his predecessor Hosni Mubarak in 2011.
The military official suggested he may now be charged by prosecutors in the case.
A senior member of Mursi's Muslim Brotherhood has earlier told AFP Mursi and senior aides had been detained in a military facility.
"Mursi and the entire presidential team are under house arrest in the Presidential Republican Guards Club," Gehad El-Haddad, the son of a top Mursi aide, told AFP.
Haddad's father, Essam El-Haddad, widely seen as Mursi's right-hand man, was among those held, he added.
The military official did not specify where Mursi is being held. Haddad said the ousted president was separated from his aides and detained at the defence ministry.
Mursi's top aides have switched off their phones. Other presidential aides who were separated from Mursi earlier in the day say they have lost communication with their leader.
Mursi had earlier been at his office in the Republican Guard's headquarters, before he was moved.
A police general told AFP that security forces were seeking to arrest leaders of his Muslim Brotherhood movement.
Police have already arrested Saad al-Katatni, head of Mursi's Freedom and Justice Party, and Rashad Bayoumi, the Muslim Brotherhood's deputy supreme guide, the general said.
Hours after the military announced it had cancelled the constitution and would appoint the head of Egypt's top court as interim president, Mursi issued a defiant call to arms in a prerecorded speech aired on Al-Jazeera television.
