Palestinians hold placards depicting a portrait of journalist Mohammed al-Qiq imprisoned by Israel, as they celebrate the announcement to end his 94-day hunger strike under a deal for his release in May.

Israel has over the past 10 days slapped “administrative detention” orders on 84 Palestinians, a controversial procedure under which prisoners can be held without charge, a Palestinian NGO said Monday.

The Palestinian Prisoners’ Club said 39 Palestinians had been arrested and placed under administrative detention for periods of between two and six months, while the other 45 had their detention prolonged.

Last Friday, journalist Mohammed al-Qiq ended a 94-day hunger strike staged in protest at his administrative detention under a deal for his release in May.

The procedure, which dates back to the British mandate of Palestine, allows Israel to hold suspects without trial for renewable six-month periods.

The latest orders raise to more than 700 the number of Palestinians held under administrative detention, out of a total of more than 7,000 Palestinians being held in Israeli jails, according to the NGO.

The Prisoners’ Club, which follows their cases, said it was the highest number since 2009.