A potential anthrax threat at the California State Capitol on Thursday forced an evacuation of the Senate and all staff, according to a memo obtained by CBS Sacramento.

The evacuations on Thursday at the swing space in downtown Sacramento were made out of an “abundance of caution,” officials said.

SACRAMENTO, Calif. (CN) — A downtown Sacramento, California, state government building housing offices and meeting space was evacuated Thursday afternoon after suspected anthrax was found, officials said.

The California Capitol Annex Swing Space is being evacuated due to a security threat. The Swing Space is on O Street between 10th and 11th streets and includes the governor's office. Memos sent to Assembly members and State Senators,

California lawmakers were ordered to evacuate a building in downtown Sacramento on Thursday after receiving a suspicious package with a threat that it contained anthrax.