Iranian authorities have executed Roozbeh Vadi, a man convicted of spying for Israel by leaking information about a nuclear scientist killed during last June's conflict. The judiciary stated that Vadi, who worked at a sensitive organization, was recruited online by Israel's intelligence agency and passed on classified information. His execution by hanging follows a series of arrests and executions of individuals accused of collaborating with Israel since the war, which saw the deaths of senior commanders and nuclear scientists. Iran remains one of the world's leading countries in carrying out executions, according to human rights groups. On the same day, another man was executed for alleged ties to the extremist Islamic State group.