Egyptian security officials said today that up to 200 protesters were detained during clashes with thousands of Tunisia-inspired demonstrators who were demanding an end to President Hosni Mubarak's authoritarian rule.
They added that more people were likely to be detained as authorities reviewed police video tapes of the nationwide protests.
A policeman and two protesters were killed in yesterday's clashes and some 250 injured.
The protests were Egypt's biggest in years and are likely to fuel dissent in a presidential election year.
Thousands of riot police deployed across Cairo today, but the city remained quiet by late morning with no sign of fresh protests.