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 "political terrorism."

According to a Sunday news release from the town of Hillsborough, a bottle filled with flammable liquid was thrown through the window of the Orange County Republican Party headquarters overnight. The flammable substance that was thrown into the office ignited and damaged the interior before burning out. No one was injured.

In addition to the fire, the news release says an adjacent building was spray-painted with the words: "Nazi Republicans leave town or else."

State GOP executive director Dallas Woodhouse called the fire "political terrorism" and said Republican offices around the state were re-examining their security.