SACRAMENTO  (AP) — California's political watchdog agency has fined the mayor of Sacramento for failing to report donations he solicited for charity organizations.

The Fair Political Practices Commission said on Monday that it found 25 cases in which Mayor Kevin Johnson failed to file timely reports on donations to a nonprofit made at the request of an elected official.

Johnson has been fined $37,500.

The FPPC investigation was triggered by its September report revealing thousands of dollars in donations to the mayor's Think Big arena task force had not been reported on time.

The mayor has raised more than $4 million from national organizations, local companies and individual donors for his city initiatives and the nonprofits he supports.

His initiatives now operate under an umbrella organization called the Sacramento Public Policy Foundation, a nonprofit with no formal affiliation with the city.