More than 400 people were cited and nine arrested in an operation today targeting those committing offenses on San Francisco Municipal Railway buses and trains, a police spokeswoman said.

Sgt. Lyn Tomioka said approximately 100 police officers, Muni inspectors and sheriff’s officials were involved in Citywide Operation Safe Muni, which was conducted between 1 p.m. and 8:30 p.m.

More than 400 people were cited for various offenses, including fare evasion, failure to provide proof of payment and eating and drinking, Tomioka said.

Six people were arrested on felony warrants and three others were arrested before being cited and released, she said.

“I think 400 (citations) shows a lot of work was done today,” Tomioka said. “It is something we will discuss in depth and detail, and decide when we’ll do it again.”

Tomioka said the operation was the first of its kind to be conducted citywide. In recent months, similar operations have been conducted in the Ingleside District, which had seen an increase in robberies and other crimes.

Last month, Muni released a study that revealed approximately one of every 10 Muni riders is not paying fares. The study was conducted between April 30 and July 23 aboard more than 1,100 bus and streetcar trips, and found 9.5 percent of riders didn’t have proper proof of payment.

Please make sure your comment adheres to our comment policy. If it doesn't, it may be deleted. Repeat violations may cause us to revoke your commenting privileges. No one wants that!