An international rights group says Egyptian President Abdel-Fattah el-Sissi has given a green light" to systematic torture inside detention facilities." Human Rights Watch says el-Sissi, a U.S. ally who was warmly received at the White House earlier this year ... "has effectively given police and National Security officers a green light to use torture whenever they please," said Joe Stork, deputy Middle East director at the New York-based group. The allegations, the group said, amount to crimes against humanity. 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. Egypt arrested or charged some 60,000 people in the two years after Mohammed Morsi, a Brotherhood leader who became Egypt's first freely elected president, was overthrown following a divisive year in power. Hundreds have gone missing in what appear to be forced disappearances, and hundreds of others have received preliminary death sentences. Based on interviews with 19 Egyptians detained as far back as 2013, the rights group documented abuses ranging from beatings to rape and sodomy. Local rights groups have documented dozens of deaths under torture in police custody. The Interior Ministry ... denied allegations of systemic torture. Citing national security, the government has shut down hundreds of websites, including many operated by independent journalists and rights groups.