An investigation into the incident is still ongoing.

Donald Trump has blamed “animals representing Hillary Clinton and Dems (democrats)” for an incident involving arson and graffiti at the Orange County Republic headquarters in Hillsborough, North Carolina on Saturday night.

Flammable material was thrown through the front window of the building on Saturday night and ignited inside, burning furniture and some of the building’s interior in the process.

Graffiti, including a swastika and a message reading ‘Nazi Republicans leave town or else’ was also spray-painted in black at the side of another building.

The firebombing of a local political headquarters in Orange County is clearly an attack on our democracy. pic.twitter.com/fr9FWGQUoG

— Pat McCrory (@PatMcCroryNC) October 16, 2016

Pics via Twitter/Pat McCrory

Hillsborough Police have said that an investigation into the incident is ongoing, but on Sunday, Donald Trump hit out on Twitter at “animals representing Hillary Clinton and Dems (democrats)” for the incident.

Animals representing Hillary Clinton and Dems in North Carolina just firebombed our office in Orange County because we are winning @NCGOP

— Donald J. Trump (@realDonaldTrump) October 16, 2016

ALL SAFE IN ORANGE COUNTY, NORTH CAROLINA. With you all the way, will never forget. Now we have to win. Proud of you all! @NCGOP

— Donald J. Trump (@realDonaldTrump) October 16, 2016

Hillary Clinton, meanwhile, called the attack “horrific and unacceptable” and added she was grateful that no one had been harmed.

The attack on the Orange County HQ @NCGOP office is horrific and unacceptable. Very grateful that everyone is safe.

— Hillary Clinton (@HillaryClinton) October 16, 2016