A coalition of 100 human and civil rights groups are calling on Secretary of State Marco Rubio to secure the release of Mohammed Ibrahim, a 16-year-old Palestinian American who has been held in Israeli prison for six months. The coalition includes the American-Arab Anti-Discrimination Committee, the Center for Constitutional Rights and Pax Christi USA.

In a joint letter, the groups say, “Mohammed is suffering from scabies and has not received any medication; he has also lost over 30 pounds due to Israel denying him food and medical treatment.” He was abducted from his family home in the West Bank over allegations of rock throwing and is currently being held in Israel’s Ofer Prison, known for its human rights abuses. Mohammed Ibrahim is the cousin of Sayfollah Musallet, a 20-year-old Palestinian American who was beaten to death by Israeli settlers in July.