Another city—Durham, North Carolina—has become the victim of a ransomware attack stemming from a Russian hacker group following a successful phishing scheme. After falling victim to the ransomware attack last weekend, the city shut down its network, including disabling access to the network by the Durham Police Department, the Sheriff’s Office and the communications center.

The ransomware attack disabled the Fire Department’s telephone service, but other critical public safety systems, including access to the 911 network, remained operational through the emergency cyber-attack remediation system.

The City of Durham has issued a warning to residents to be cautious about any emails that might be impersonating city communications, but which could be possible phishing schemes.