Gov. Tim Walz of Minnesota activated the National Guard to help the city of St. Paul address a cyberattack that was detected last Friday.
Gov. Tim Walz of Minnesota on Tuesday activated the state National Guard to help officials in St. Paul, the capital, respond to a complex cyberattack that was first detected on Friday.
Mayor Melvin Carter of St. Paul said the city had shut down the bulk of its computer systems as a defensive measure as state and federal investigators tackled what he called “a deliberate, coordinated digital attack, carried out by a sophisticated external actor.”
Mr. Carter said that the F.B.I. and several state agencies were helping assess who was behind the attack. He declined to say whether ransom had been demanded or whether there was any evidence suggesting a foreign government was behind the attack.
Emergency services, including police response systems, were not crippled by the attack, the city said in a statement. The shutdown meant that city employees did not have access to the internet in municipal buildings, and that routine services such as library loans and online payment systems were inaccessible.