Vandals on Wednesday night spray painted the word "Nazis" in the shape of a heart on the side of the New Hampshire Republican Party headquarters.
In addition to the graffiti, the Concord headquarters also had a window broken by a rock, the Concord Monitor reported Thursday.
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Patrik Hynes, a senior adviser for the Republican Party, said workers noticed the graffiti on Thursday morning but it did not appear as though anyone tried to gain entry.
"I think it's safe to say that the staff was concerned. Obviously, it's an unpleasant thing for anybody to experience," Hynes said.
He noted there are security cameras in the front of the building but not the back, something he said will change going forward.
The state's Democratic Party chairman, Ray Buckley, issued a statement condemning the act.
"Vandalism is unacceptable, it's inexcusable and it's wrong," Buckley said. "The New Hampshire Democratic Party wholly condemns this criminal action and hopes the perpetrator is held accountable. There is no place for that in our politics."
Gov. Chris Sununu (R.), in a statement to WMUR, said, "It is certainly disturbing and very sad to see vandalism with such hateful rhetoric. There is no place for that in our politics or society."
New Hampshire's senators, both Democrats, denounced the vandalism on Twitter.
"Vandalism at @NHGOP office is disgusting & has no place in our society. Perpetrator must be held accountable," Sen. Maggie Hassan said.
— Sen. Maggie Hassan (@SenatorHassan) August 17, 2017
"Vandalism at @NHGOP is shameful & doesn't belong in our political rhetoric. We all need to stand together in the face of hate & bigotry," Sen. Jeanne Shaheen said.
Vandalism at @NHGOP is shameful & doesn't belong in our political rhetoric. We all need to stand together in the face of hate & bigotry.
— Sen. Jeanne Shaheen (@SenatorShaheen) August 17, 2017
The vandalism occurred as President Donald Trump continues to face criticism for his comments on the violence in Charlottesville, Va. last weekend, when white supremacist protesters clashed with counter-demonstrators. Critics said that Trump did not condemn white supremacists and neo-Nazis in a strong enough manner.