Palestinians are marking the annual Prisoner’s Day holiday with marches demanding the release of political prisoners. Rights groups say there are nearly 10,000 Palestinians currently held in Israeli jails. Four hundred of them are children. More than a third are being held without charge under Israel’s so-called administrative detention policy.

On Wednesday a lawyer for the jailed director of Gaza’s Kamal Adwan Hospital, Dr. Hossam Abu Safiya, said his client had experienced beatings, mistreatment and torture inside Israel’s notorious Ofer Prison. The lawyer, who was last able to visit Dr. Abu Safiya on March 19, said, “He is suffering greatly. He is exhausted from the torture, the pressure and the humiliation he has endured to force him to confess to acts he did not commit.”