More than 500 backers of Egypt's blacklisted Muslim Brotherhood were arrested as clashes erupted on the anniversary of its 2011 uprising, a minister said Monday, in the biggest police sweep for months.
Twenty people, mostly demonstrators, were killed Sunday when protesters clashed with security forces after Islamists called for rallies against President Abdel Fattah al-Sisi's government as Egypt marked the fourth anniversary of the toppling of ex-strongman Hosni Mubarak.