Egypt has been under a state of emergency since IS-claimed bombings and suicide attacks targeting minority Coptic Christians killed scores earlier this year, and attacks on the mainland have recently increased.
Most of the detainees are alleged supporters of the Muslim Brotherhood group, which rose to power after the 2011 uprising that toppled President Hosni Mubarak but has been the target of a sweeping crackdown since the military overthrew an elected Islamist president in 2013.
President Abdel-Fattah el-Sissi declared the transition complete in a 32-minute address to parliament on Saturday, while noting that Egypt is still struggling to rebuild its economy and confront Islamic extremists.
Brig. Gen. Mohammed Samir said that four assault boats were destroyed and that 32 attackers were arrested.
El-Sissi said he had always said he will not interfere in judicial affairs, and would respect the courts’ independence.
El-Sissi’s nationwide turnout was around 44 percent, well below the nearly 52 percent won by Morsi in June 2012.
El-Sissi’s campaign said turnout nationwide was around 44 percent, even after voting was extended for a third day on Wednesday.