Iran has heightened security measures as millions gather for mourning ceremonies for Ayatollah Ali Chamenei.

In Tehran, public mourning ceremonies for the slain Ayatollah Ali Chamenei have commenced, with the state broadcasting images of his casket displayed in the Mosalla Grand Mosque. The ceremonies will last three days in Tehran before moving to Qom and Iraq, culminating in his burial in Mashhad.

To ensure safety during the events, Iran is closing its airspace for several days and deploying over 65,000 security personnel in major cities, with an additional 200,000 in provinces. Iranian military forces have warned of severe repercussions for any miscalculations amid ongoing tensions with the U.S. and Israel.