Other pictures show him sitting on a chair on the right side of the room, holding prayer beads and looking at an imam delivering a sermon.
In the 12-minute video, the ayatollah is seen listening and speaking during the event, where Shia worshipers gather to mark the end of a 40-day mourning period commemorating the seventh-century death of Imam Hussein, grandson of the Prophet Mohammed. . A video on state media showed Khamenei addressing the crowd at the event.
The New York Times said Friday that Khamenei had canceled all public appearances last week after falling “seriously ill” and was under observation by a team of doctors.
Citing four unnamed people familiar with his health situation, the Times reported that Khamenei was on bed rest after undergoing surgery for an intestinal obstruction last week.
Pictures posted on several Iranian media outlets indicated that the 83-year-old ayatollah was able to make a public appearance at the event.
Ayatollah Khamenei has been the leader of Iran for the past three decades and is one of the longest-serving rulers in the Middle East. It is still unclear who will succeed the leader, but a meeting of experts is expected to be convened to discuss his successor in the event of his death.