Iran has a horrific track record of putting juvenile offenders to death, and Amnesty International has called on the authorities immediately to halt plans to execute three juveniles - Mohammad Kalhori, Barzan Nasrollahzadeh and Shayan Saeedpour. They were all convicted for separate crimes committed while they were under 18, and are now at risk of imminent execution. Mohammad Kalhori was only 15 when arrested. Iran is one of a handful of countries that execute young offenders, in flagrant violation of international law. In the past three years the authorities have stepped up such executions. Amnesty said there is an alarming pattern of scheduling juvenile executions at short notice to minimise interventions to save lives. More than ninety people are currently known to be on death row for crimes committed while a juvenile, though the real number is likely to be far higher.