Fifteen night attackers known as Jenjeweed in Yei municipality were finally arrested on Wednesday after carrying out their operations for quite a long time.
The attackers include 14 males and one female.
Police commissioner colonel Jeremiah Maker Nai says the perpetrators are undergoing investigation.
The attackers have been looting, beating residents along roads and threatening security in the town, he adds.
He says the perpetrators were well armed, carrying machetes, including knives.
Police are still to find out who supported the group with ammunitions, he concluded.