HILLSBOROUGH, N.C. (AP) — Authorities are investigating after a local Republican Party office in North Carolina was set on fire in what a state GOP official called an act of “political terrorism.”

A bottle filled with flammable liquid was thrown through the window of the Orange County Republican Party headquarters overnight, according to a Sunday news release from the town of Hillsborough. A bottle of flammable liquid was thrown through the Orange County Republican headquarters, police said

"The flammable substance appears to have ignited inside the building, burned some furniture and damaged the building's interior before going out. Dallas Woodhouse, executive director of the North Carolina Republican party, told CNN's John Berman and Kate Bolduan that roughly 80 county GOP offices were told to close early Sunday, and a temporary mobile office was erected in Orange County, near the site of the firebombing. The Hillsborough Police Department said in a statement Monday that it was still processing evidence from the scene and that it was receiving assistance from the FBI, North Carolina State Bureau of Investigations and the Bureau of Alcohol, Tobacco, Firearms and Explosives. State GOP executive director Dallas Woodhouse said people sometimes work after-hours and he felt lucky no one was there at the time. It is a miracle that nobody was killed,” he said in an interview, calling the fire an act of “political terrorism.”

He said Republican offices around the state were re-examining their security. 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

Woodhouse told CNN's John Berman and Kate Bolduan that roughly 80 county GOP offices were told to close early Sunday, and a temporary mobile office was erected in Orange County, near the site of the firebombing. Very grateful that everyone is safe.”

Republican nominee Donald Trump blamed the act on Democrats in a Tweet and he also encouraged local Republicans, saying: “With you all the way, will never forget. Tom Stevens, mayor of the town about 40 miles northwest of Raleigh, said it was fortunate the fire didn't burn the office and other adjacent buildings that are decades old to the ground. Registered Democrats far outnumber Republicans in Orange County, according to elections board data, and President Barack Obama won 70 percent of the vote there in the 2012 presidential election.
An arsonist firebombs a Republican Party office in Hillsborough, North Carolina, and leaves a graffiti message reading, "Nazi Republicans get out of town or else."