Published: Aug 24, 2013 12:17 AM EDT

SAN DIEGO (AP) - The California attorney general has opened a criminal investigation of San Diego Mayor Bob Filner, who agreed to resign after lurid sexual harassment allegations eroded his support less than nine months on the job.
    
Attorney general spokesman Nicholas Pacilio confirmed Friday that a criminal investigation is underway but declined to elaborate. He spoke moments after Filner told the City Council he would leave office next week.
    
The San Diego County Sheriff's Department is fielding complaints of sexual misconduct by the mayor and delivering its findings to the attorney general's office.
    
San Diego County District Attorney Bonnie Dumanis has recused herself. She lost to Filner in last year's election.
    
Filner was both regretful and defiant during a City Council meeting today. He apologized to his accusers but insisted he was innocent and said he was the victim of a "lynch mob."

(Copyright 2013 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)