Following the October 29, 2025, general elections in which President Samia Suluhu Hassan won with 97.66% of the vote amid fraud allegations, security forces in Tanzania killed hundreds of protesters nationwide, according to United Nations estimates, with opposition leaders claiming over 1,000 deaths. Incidents included shootings in cities like Dar es Salaam and Arusha, enforced disappearances, internet blackouts, and arrests on treason charges for participants in the 'Nywinywi' dance challenge mocking the regime. The UN has called for investigations into the killings and violations, while the government denies excessive force.