Thousands of mourners flooded the streets of Yasuj in central Iran on Sunday to begin a 40-day mourning period for Supreme Leader Ayatollah Ali Khamenei, who was killed in a massive joint US-Israeli offensive.

Footage released by the Tasnim news agency showed crowds engaging in traditional rites of grief, beating their heads and chests as the nation reels from the loss of its top leadership.

Similar scenes of mass mourning were reported across Lorestan province, reflecting a country gripped by both sorrow and a growing demand for retribution.

The humanitarian toll of the conflict has reached staggering levels, with the Iranian government confirming that at least 201 people have been killed in strikes spanning 24 provinces.

In the wake of the "decapitation" of the state's highest office, an interim council led by President Masoud Pezeshkian has assumed control of the country.

This council is tasked with managing the state’s defense and civil affairs until the Assembly of Experts can select a permanent successor to Khamenei.

Despite the loss of its Supreme Leader and several top military commanders, the Islamic Revolutionary Guard Corps (IRGC) has immediately moved to execute a sprawling counter-offensive.

The IRGC claims to have already struck 27 bases hosting US forces across the Middle East, along with strategic military sites in Tel Aviv.

Reports of explosions have surfaced in Qatar, the UAE, Kuwait, Bahrain, Jordan, Saudi Arabia, and Iraq, as Iran attempts to demonstrate that its military reach remains intact despite the recent strikes.

The situation escalated further Sunday as President Donald Trump issued a stern ultimatum via social media, warning Tehran that any "hard" hit today would be met with "a force that has never been seen before."

As US and Israeli air defense systems scramble to intercept the ongoing Iranian barrage, the international community is bracing for the potential of a total regional collapse.

With the Strait of Hormuz reportedly closed and global shipping rerouting around Africa, the killing of Khamenei has moved the region into a state of high-intensity, multi-front warfare.