California state officials have launched an investigation into reports that signature gatherers in San Francisco were offering cash and pizza to voters in exchange for signing ballot initiative petitions, a practice that violates state election laws.

The alleged scheme involved masked individuals approaching potential signers with financial incentives to add their names to various ballot measures. Such payments to voters for signatures on initiative petitions are prohibited under California election code.

The investigation comes amid what observers describe as increasingly lucrative ballot initiative campaigns across the state. California's initiative process allows citizens to place proposed laws and constitutional amendments on the ballot by collecting a required number of voter signatures.

State election officials confirmed they are examining the reported violations but declined to provide details about the scope of their investigation or potential penalties. The officials did not specify which ballot initiatives were involved in the alleged illegal activity.

The signature-gathering phase is a critical step in California's ballot initiative process, where campaigns must collect hundreds of thousands of valid signatures from registered voters to qualify measures for the ballot. Professional signature-gathering operations have become a multi-million-dollar industry in the state.