The crash comes at a time of growing dissent within Iran over an array of political, social and economic crises.
Iran’s clerical rulers face international pressure over Tehran’s disputed nuclear programme and its deepening military ties with Russia during the war in Ukraine.
Raisi, 63, was elected president in 2021, and since taking office has ordered a tightening of morality laws, overseen a bloody crackdown on anti-government protests and pushed hard in nuclear talks with world powers.
In Iran’s dual political system, split between the clerical establishment and the government, it is Raisi’s 85-year-old mentor Ayatollah Ali Khamenei, supreme leader since 1989, who has the final say on all major policies.
