US Capitol Police say they arrested a California man who had multiple knives in his truck, which had a swastika and other white supremacist symbols painted on it, near the Democratic National Committee headquarters early Monday morning.

Police say the truck didn’t have a license plate but instead a picture of an American flag.The officers pulled over the truck and noticed a bayonet and machete, which are illegal in the District of Columbia. The driver, identified as 44-year-old Donald Craighead of Oceanside, California, was arrested.

The arrest comes while law enforcement officials are already bracing for potential clashes and unrest during an upcoming right-wing rally on Saturday in Washington, DC,