Monday, 15 April 2024 marks the tenth anniversary of the arrest of Saudi human rights defender Waleed Abu al-Khair, who is serving a 15-year prison sentence as a result of his peaceful human rights activism. He has repeatedly been ill-treated in prison, including being denied vital medical care. The undersigned organisations call on the Saudi authorities to allow him immediate access to the medical care he requires, and to immediately and unconditionally release him, as well as all other prisoners unjustly detained for peacefully exercising their fundamental rights.