California State Senator Leland Yee (D-San Francisco) talks in his office about the state's budget impasse in San Francisco, California July 3, 2009. REUTERS/Robert Galbraith

By Dan Levine

SAN FRANCISCO (Reuters) - California state Senator Leland Yee was arrested on Wednesday as federal investigators conducted public corruption raids across California, shaking up the election season in the nation's most populous state.

In addition, federal authorities arrested Raymond "Shrimp Boy" Chow, Federal Bureau of Investigation spokesman Peter Lee said, referring to a figure previously convicted in a San Francisco organized crime probe.

Yee, a San Francisco Democrat who is currently running for secretary of state, was indicted on public corruption charges, ABC7 News in San Francisco reported on Wednesday.

A spokesman for Yee declined to comment. Yee is scheduled to appear in federal court later on Wednesday.

Yee was elected to the California state senate in 2006, representing a district which includes San Francisco and San Mateo County south of the city. He is the first Chinese American elected to the chamber.

Chow was indicted on racketeering charges and eventually sentenced to 24 years in prison in 1995, according to the San Jose Mercury News. He was released early after cooperating with authorities and has said he is no longer involved in criminal activity.

Yee was arrested at home. The FBI executed search warrants in several locations around the state, including Yee's office in Sacramento, where a crush of reporters had gathered after the arrest.

A spokesman for California Senate President pro Tem Darrell Steinberg said he was gathering more information about Yee's arrest.

In a statement, senate Republican leader Bob Huff said he was "deeply troubled" by news of Yee's arrest. Californians "have every reason to be concerned about whether the Legislature is more concerned about serving themselves than the people."

Along with Yee, five other candidates are running to replace Secretary of State Debra Bowen. As part of his campaign, Yee touted online voter registration legislation that he authored as a legislator.

Lee emigrated to San Francisco from China at the age of 3. He is a child psychologist who served on the city's Board of Supervisors and as a state assemblyman before becoming a state senator.

(Reporting by Dan Levine; Editing by Cynthia Osterman)