RNA - A list of those detained was published on Monday by the Egyptian Centre for Economic and Social Rights, a Cairo-based civil society organisation, The Middle East Eye reported.
They include Mahienour El-Massry, a leading human rights lawyer who was arrested outside the state security prosecutor’s headquarters on Sunday as she was leaving after visiting others in detention.
Crowds took to the streets of Cairo and other cities on Friday night in the first major street protests against Egyptian President Abdel Fattah el-Sisi since he seized power in a military coup in 2013.
Security forces had used violent force and arrests to disperse crowds heading towards Tahrir Square, the epicentre of the 2011 uprising against former President Hosni Mubarak, according to MEE.
Video footage posted online showed security forces in cities across Egypt rounding up protesters and taking them into custody.
Elsewhere, protesters clashed with security forces in Suez on Saturday night, with one witness telling the AFP news agency that police had used tear gas and live ammunition, causing injuries among protesters.
ECRF said on Sunday that it had recorded arrests in at least 12 locations, including Cairo, Giza, Alexandria, Suez, and towns such as Dakahlia, Qalyubia and Kafr el-Sheikh.
Human Rights Watch has called on the Egyptian authorities to allow peaceful protest and said that Sisi's government had a track record of cracking down on opposition.
“President al-Sisi’s security agencies have time and again used brutal force to crush peaceful protests,” Michael Page, deputy Middle East and North Africa director at Human Rights Watch, stated, adding, “The authorities should recognise that the world is watching and take all necessary steps to avoid a repetition of past atrocities.”
Tens of thousands of people have been detained by Sisi's government since 2013 in a widespread crackdown on opposition that has targeted activists from the now-banned Muslim Brotherhood of deposed former President Mohamed Morsi and other political dissidents.