A brief timeline of Iranian cyberattacks on the U.S.

Investigators are probing whether Iranian hackers are behind the malicious cyber activity this week that targeted water systems in seven states, including Minnesota.

If they are found to be the culprits, it would not be the first time Iranian actors have been linked to cyberattacks against the U.S.

For more than a decade, Iranian-linked operators have repeatedly hacked accessible American targets.

Seven Iranians working for companies connected to the Iranian government and Islamic Revolutionary Guard Corps were charged a decade ago with distributed denial-of-service, or DDOS, attacks against 46 financial institutions between 2011 and 2013.

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