(CNN) — Arizona investigators surveilling the man accused of shooting at the Democratic National Committee office in a suburb of Phoenix saw him posting political signs with bags of a white, powdery substance attached,

An Arizona prosecutor says the man arrested in the three-time shooting of a Democratic campaign office had more than 120 guns and over 250,000 rounds of ammunition in his home.

Jeffrey Michael Kelly was arrested Tuesday and charged with 10 counts including committing a terrorist act. The FBI was searching his home on Wednesday.

The man, Jeffrey Michael Kelly, 60, was arrested Tuesday, according to the authorities. Mr. Kelly also set out anti-Democratic Party signs lined with razor blades near his home, attaching bags filled with an unknown white powder and labeled “Biohazard,” according to court papers.

The suspect is accused of hanging offensive political signs lined with razor blades in other parts of the battleground state

Authorities searching the home of a 60-year-old man accused of shooting at a Democratic National Committee office in Tempe, Arizona, discovered an extensive collection of weapons — including 120 guns,

No one was in the office during the shootings and there were no casualties. Police said Kelly fired BB pellets and then gunshots at the glass door and window of the DNC field office in the early hours of Sept.