Election workers conduct ballot tabulation at the Los Angeles County Ballot Processing Center during California's state primary election in the City of Industry, Calif., on June 2, 2026. Patrick T. Fallon/AFP via Getty Images

LOS ANGELES—Federal authorities on Friday announced they were investigating potential voter fraud in California as key races remained untallied days after the June 2 primary election, sparking questions about the state’s potentially weeks-long process for finalizing the results.

More than three million votes remained uncounted as of Thursday, the latest update available, according to the California Secretary of State, which has until July 10 to verify the election results.We had a problem loading this article. Please enable javascript or use a different browser. If the issue persists, please visit our help center.