This research briefing documents the horrifying surge in executions in Iran in 2023, the highest in eight years. More than half of the executions were for drug-related offences amid a distressing return to a lethal anti-narcotics policy since Ebrahim Raisi’s rise to presidency in 2021. With systemic impunity in Iran, the briefing reiterates the need for states to initiate criminal investigations under the principle of universal jurisdiction into crimes under international law committed by Iranian officials, irrespective of the absence or presence of the accused in their territory.