Iran executed an Iranian-Swedish dual national on Saturday accused of masterminding a 2018 attack on a military parade that killed at least 25 people, one of the several enemies of Tehran seized abroad in recent years amid tensions with the West.

Farajollah Cha’ab, also known as Habib Asyoud, had been a leader of the Arab Struggle Movement for the Liberation of Ahwaz, an Arab separatist movement behind oil pipeline bombings and other attacks in Iran’s oil-rich Khuzestan province. The group had claimed credit for the 2018 attack in its immediate aftermath. Cha’ab’s execution comes after a Swedish court last year sentenced an Iranian to life in prison over his part in the 1988 mass executions in Iran at the end of its war with Iraq.