Zimbabwean opposition leader Morgan Tsvangirai withdrew from a run-off election against President Robert Mugabe due to concerns about violence and a lack of fairness in the election process. Tsvangirai called on the United Nations and the African Union to intervene to prevent what he described as "genocide" in the country. Tsvangirai's decision came after his party's rally was disrupted by pro-Mugabe youth militia. Tsvangirai and the Movement for Democratic Change have accused government security forces and militia of using intimidation tactics to ensure Mugabe's victory in the upcoming election. Tsvangirai reiterated his belief that there was a state-sponsored effort to keep Mugabe in power. He stated that the MDC cannot expect voters to risk their lives by casting their votes on June 27. Tsvangirai, who has been detained by police multiple times during campaigning, mentioned that 86 MDC supporters had been killed and 200,000 displaced from their homes. Mugabe has consistently refused to hand over power to the opposition, accusing them of being controlled by Britain and the United States. Despite ruling since independence in 1980, Mugabe denies responsibility for the political violence and economic downfall in the country. Millions of people have left their country due to the political and economic crisis and sought refuge in neighboring states. During an MDC rally in Harare on Sunday, thousands of youth militia loyal to Mugabe attacked journalists and election observers, causing them to flee. Despite the police initially banning the rally, a high court in Harare overturned the ban on Saturday. Tsvangirai claimed victory in the March vote and agreed to a run-off only under international pressure. The state-run media has refused to air opposition political ads and police have obstructed some of their rallies. Tendai Biti, a high-ranking MDC official and close aide to Tsvangirai, is currently in custody facing charges of treason and other serious offenses that could result in the death penalty. A magistrate has ruled that he must remain in custody until at least July 7. There is increasing pressure on Mugabe's government to stop the violence, with a growing number of African leaders expressing concerns that the upcoming election will lack legitimacy. Angolan President Jose Eduardo dos Santos, a longtime ally of Mugabe, has urged the Zimbabwean leader to allow the election to proceed peacefully and in accordance with democratic principles.