The Phoenix Police Department said a non-specific threat was left on a voicemail at the headquarters, near 24th Street and Osborn Road.
Officers and staffers spent about two hours looking for amything out of place.
Phoenix police were called out to investigate Monday afternoon.
PHOENIX - Authorities have given the all-clear after a threat was called in to Arizona Republican Party headquarters in Phoenix.
A Republican Party spokesman told ABC15 they contacted police Monday after receiving a bomb threat around 3:20 p.m.
Police and employees searched the building for items or people who do not belong. Their search wrapped up just before 5:30 p.m. with nothing found.
State chairman Robert Graham said workers and volunteers were told to wait across the street and were being questioned by officers.
Footage from the scene showed at least two police vehicles stationed outside the office and the police department's helicopter was overhead.
Stay with abc15.com for updates.