Question: Please provide information regarding the existence of non-State actors (private individuals) active in immigration control, such as vigilante groups or groups of private citizens acting with powers similar to security forces.
问 题：请提供资料，说明是否有非国家行为者(私营个体)积极参与移民管制，诸如拥有与安全部队类似权力的自卫团体或公民私人团体。