The funeral of Ismail Haniyeh, the slain Hamas leader, was held in Tehran, led by Ayatollah Ali Khamenei amid heightened security and significant public mourning. Haniyeh was reportedly killed by a missile strike, which Iran attributes to Israel, leading to vows of retaliation from Iranian leaders and Hamas officials. Khamenei declared that the 'criminal and terrorist Zionist regime' should prepare for severe punishment for what he termed a martyrdom on Iranian soil. The funeral procession saw thousands of attendees chanting anti-Israel sentiments, while Haniyeh’s body is set to be transferred to Qatar for burial. The assassination has raised fears of escalating regional tensions, with Israeli Prime Minister Netanyahu warning of potential retaliatory actions. The incident reflects the fragility of Iran's security and the ongoing volatility in the region following a series of high-profile attacks on militant leaders.