A serious cyberattack has affected water systems across the US. Officials are working to secure facilities and ensure drinking water safety. The US Cybersecurity and Infrastructure Security Agency and other groups have been responding to the issue for about a week.

They are trying to help water facilities protect themselves. Details of the attack are available from NewsChannel 5 WTVF, a local CBS affiliate. No contamination incidents have been reported so far, but some utilities have taken precautions such as issuing boil-water notices.