State television broadcasted images of Mostafa, Meysam, and Masoud Khamenei praying in the vast courtyard of the Imam Khomeini Grand Mosalla. The brothers stood directly behind the remains of their father and four other family members.

The late supreme leader and his family were killed on February 28 by an airstrike launched during a joint United States and Israel military campaign against Iran. While a ceasefire recently ended weeks of regional destruction, Iran’s theocratic government remains firmly in power with the backing of the Islamic Revolutionary Guards Corps (IRGC).

Sunday's prayers followed an indoor lying-in-state for senior officials and a public viewing on Saturday, where the remains of Khamenei, his daughter, son-in-law, daughter-in-law, and 14-month-old granddaughter were displayed outdoors under glass.

Tens of thousands of mourners—including soldiers, seminary students, and ordinary citizens—filled the complex named after Iran's first supreme leader, whom Khamenei succeeded in 1989.

Reuters reported that mourners prayed in unison and waved flags decorated with promises of revenge against America and Israel.

The Islamic Republic has organized a week of mass funeral processions to demonstrate public devotion and revolutionary spirit. The remains will be transported to key Shi'ite religious sites across Iran and neighboring Iraq, with ceremonies scheduled in Qom, Mashhad, Najaf, and Kerbala through Thursday.