The September Massacres were a series of killings and summary executions of prisoners in Paris that occurred in 1792 from 2 September to 6 September during the French Revolution. Between 1,176 and 1,614 people were killed by sans-culottes, fédérés, and guardsmen, with the support of gendarmes responsible for guarding the tribunals and prisons, the Cordeliers, the Committee of Surveillance of the Commune, and the revolutionary sections of Paris.