The group, HaMoked, which regularly gathers figures from Israeli prison authorities, said that 798 Palestinians are currently being held in so-called administrative detention, a practice where the prisoners can be held for months, do not know the charges against them and are not granted access to the evidence against them.

The group said the number of those held in administrative detention has risen steadily this year, as the Israeli occupation conducts nightly arrest raids in the occupied West Bank in response to a spate of attacks against Israelis earlier this year.

The Israeli occupation clams it uses administrative detention to impede attacks and restrain dangerous militants without revealing sensitive intelligence. Rights groups and Palestinians say it is an abusive system that denies freedom without due process, leaving some Palestinians for months or even years behind bars with no evidence against them made accessible. Some resort to life-threatening hunger strikes to draw attention to their detention, which often drives up tensions between Israeli forces and Palestinians.

“Administrative detention should be an exceptional measure, but Israel makes wholesale use of this detention without trial,” said Jessica Montell, HaMoked’s executive director. “This has to stop. If Israel cannot bring them to trial, it must release all administrative detainees.”