Washington (CNN) A rare disturbance broke out in the Supreme Court on Wednesday as several protesters stood up and shouted what appeared to be comments criticizing the court's controversial 2010 Citizens United campaign finance decision that was issued five years ago this month.

As court opened, Chief Justice John Roberts was preparing to announce the day's opinions when he was cut off by the first protester who shouted, "We are the 99%."

Roberts then tried to joke, "Our second order of business today is ..." until he was cut off by a second protester.

A group called 99rise has taken credit for the disruption. The group, which calls itself a grassroots organization trying to get money out of politics, issued a press release saying in part: "We have seen the consequences of the free flow of private money rushing into our public political system."

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