Human Rights Watch called on Egypt’s military-backed government to immediately release from detention five aides of ousted Islamist President Mohamed Morsy.

The New York-based advocacy group said in a statement that the five have been held at an undisclosed destination since July 3, the day when the military ousted Morsy after millions demonstrated demanding he step down.

It said the five were among nine close Morsy aides detained that day. The other four have been transferred to regular prisons and are facing criminal charges.

“What kind of roadmap is this where a military-backed government can brazenly disappear former presidential aides for 150 days without any explanation?” said Sarah Leah Whitson, Middle East and North Africa director at Human Rights Watch. She was referring to the roadmap for a post-coup return to democracy announced by military chief Gen. Abdel-Fattah el-Sissi when he toppled Morsy, Egypt’s first freely elected president.

“Forcibly disappearing people for months on end doesn’t inspire confidence that this government intends to follow the rule of law,” she added. “The prolonged enforced disappearance of anyone is a crime, pure and simple. The Egyptian authorities should immediately free them unconditionally.”

According to HRW, the five still held at a secret location are- Essam el-Haddad, Mr. Morsy’s top foreign policy adviser, Ayman Ali, who advised him on the affairs of Egyptian expatriates, aide Ayman el—Serafy, media adviser Abdel—Meguid el—Meshaly and foreign affairs aide Khaled el—Qazzaz.

There has been no word from the military or the government it backs on the fate or whereabouts of the five, but there have been reports in the local media linking some of them to ongoing criminal investigations, chiefly to do with conspiring with foreign powers against the country.

The HRW report comes at a time when authorities are pressing ahead with a harsh crackdown on Morsi’s Muslim Brotherhood. Already, thousands have been arrested, including most of the Brotherhood’s top leaders. Mr. Morsy himself was held at an undisclosed military facility until last month when he appeared in court along with 14 other Brotherhood leaders to face charges of inciting murder outside the presidential palace in December last year.

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