Iran’s supreme leader and militia representatives prayed Wednesday over the coffins of the late president, foreign minister, and other officials killed in a helicopter crash earlier this week. Hundreds of thousands later joined a procession down Tehran’s main boulevard.

Iranian President Ebrahim Raisi, a hard-line protégé of the country’s supreme leader, who oversaw mass executions in 1988 and later led Iran as it enriched uranium to near weapons-grade levels and launched a major drone-and-missile attack on Israel, has died at 63.