Israel has transferred hundreds of Palestinian detainees out of the shadowy detention facility of Sde Teiman in Israel’s Negev desert, a state attorney told Israel’s Supreme Court on Wednesday during a first-ever hearing about the facility where prisoners from Gaza have allegedly been held under conditions of extreme abuse.

Three Israeli whistleblowers told CNN that Palestinian detainees at the facility were constantly blindfolded and held under extreme physical restraint. Doctors sometimes amputated prisoners’ limbs due to injuries sustained from continuous handcuffing, one whistleblower said. The account tallied with details of a letter authored by a doctor working at Sde Teiman published by Ha’aretz in April.

According to the accounts, the camp some 18 miles from the Gaza frontier is split into two parts: enclosures holding scores of detainees from Gaza, and a field hospital where wounded detainees are blindfolded, strapped to their beds, wearing diapers and fed through straws.

Responding to CNN’s request for comment on all the allegations made in its May 10 report, the Israeli military, known as the Israel Defense Forces (IDF), said in a statement: “The IDF ensures proper conduct towards the detainees in custody. Any allegation of misconduct by IDF soldiers is examined and dealt with accordingly. In appropriate cases, MPCID (Military Police Criminal Investigation’s Division) investigations are opened when there is suspicion of misconduct justifying such action.”

“Detainees are handcuffed based on their risk level and health status. Incidents of unlawful handcuffing are not known to the authorities.”