The White House is preparing a public indictment of Iran, blaming hackers in the Islamic Republic for a 2013 cyberattack on New York.

The censuring would be the first of its kind since the US brokered a nuclear deal with Iran, seeking to lessen the nation’s uranium enrichment in exchange for a lowering of economic sanctions.

The Justice Department is currently prepping the indictment, according to CNN, which pertains to the cyberattack on a New York dam, an incident that insiders say was an aim to test the site for defense weaknesses.