A California woman tired of packages being stolen from her post office mailbox mailed herself an Apple AirTag to track the thieves.

The woman had had several items stolen from her mailbox at the Los Alamos Post Office already when she thought of the idea, the Santa Barbara County Sheriff’s Office said Tuesday. Law enforcement tracked the AirTag to a block in Santa Maria, about 16 miles (26 kilometers) from the post office and arrested two suspects — a 27-year-old woman from Santa Maria and a 37-year-old man from Riverside.