AN JOSE, Calif. (AP) — San Jose police have arrested three teenagers they suspect of being the so-called “Geisha Doll” crew that robbed more than a dozen minimarts and gas stations.

The San Jose Mercury News reports Friday that two 17-year-old boys and a 16-year-old were taken into custody earlier this year.

READ MORE: Bay Area Senator Proposes 12-Year-Olds Should Have Vaccination Rights Without Parents Consent

Their names aren’t being released because they are minors.

READ MORE: DUI Suspected In Wrong-Way Crash That Killed Elk Grove Officer

Police believe they are responsible for at least a dozen holdups in San Jose and Milpitas since October. In some cases, the robbers donned distinctive “geisha doll”-style masks.

MORE NEWS: Sacramento Buys Vacant 102-Acre Meadowview Road Lot To Help Homeless Community

Police say store clerks were threatened with a gun or knife and some were pistol-whipped.