Democratic National Committee Chairwoman Debbie Wasserman Schultz said she was “deeply concerned” about the behavior of Bernie Sanders supporters after Nevada Democrats filed a complaint about their “explosive” behavior at their state convention.

“We are deeply concerned about the troubling details laid out in the letter from the Nevada Democratic Party,” Wasserman Schultz wrote in a statement on Tuesday, “Our democracy is undermined any time threats, intimidation, physical violence or damage to property are present. If there are legitimate concerns, they must be addressed in an orderly, civil and peaceful manner.”