Police in North Carolina sought leads on Monday about a fire they said was deliberately set at a local Republican headquarters over the weekend.

U.S. Democratic party supporters have raised over US$13,000 to rebuild a Republican Party office in North Carolina after it was vandalized and firebombed in what GOP officials have called an act of "political terrorism."

A local Republican Party office in North Carolina was damaged by fire and someone spray-painted an anti-GOP slogan referring to "Nazi Republicans" on a nearby wall.