Who killed the khaleefa usman?

Uthman ibn Affan, the third caliph of Islam, was assassinated in 656 CE by a group of rebels who were discontented with his rule. The dissent arose from accusations of nepotism and favoritism, as he appointed many of his relatives to key positions. The situation escalated, leading to a siege of his home in Medina, where he was ultimately killed. His assassination marked a significant turning point in Islamic history and contributed to the ensuing civil strife known as the First Fitna.