WOODSIDE — Devices used to steal credit card numbers were recently discovered at the only gas station in Woodside, where some of the Bay Area’s wealthiest residents live, authorities said.

An employee of the Chevron at 2950 Woodside Road found three of the so-called “skimming devices” on Monday, according to the San Mateo County Sheriff’s Office.

It is a felony to use one of the devices.

In a news release Tuesday, the sheriff’s office said “it is unknown how long the skimming devices were in the gas pumps.” Detectives are working to track down more information and evidence.

This isn’t the first time the Chevron has been targeted by thieves, according to one Yelp review. The reviewer said his credit card number has been stolen at the gas station five times in the past two years.

Anyone with information about the devices can contact the sheriff’s office’s Detective Bureau at 650-599-1536. Those wishing to remain anonymous can call 800-547-2700.