Hackers associated with Anonymous are claiming responsibility for a cyberattack that took the state of Michigan’s official website offline on Wednesday. It is the second attack the group has engaged in as part of an effort to retaliate for the lead-contaminated water in Flint.

The site went down Wednesday afternoon, briefly regained service and subsequently went down again. An account associated with the international hacking collective took credit on Twitter, posting an image of the website and saying “#down.” The issue appeared to have been resolved Thursday.