An eleventh woman’s body has been found in Ekurhuleni, South Africa, as police investigate a recent spate of killings. The body was found in Springs, and the woman was reportedly strangled, local media said.

Police have made arrests in three of the cases. Officers are still working to establish whether the killings are connected, and have not described the deaths as the work of a serial killer.

The discovery has alarmed residents in the area east of Johannesburg. Ekurhuleni is a metro municipality in Gauteng province, where the latest body was found.

The National reported that investigators are treating each case on its own facts while looking for links. Forensic teams are examining the latest scene for clues.

The police have urged anyone with information to come forward. More arrests are expected as the investigation continues. The investigation is continuing, and police say more details will be shared with the public as it progresses.