For weeks, sophisticated burglars broke into the homes of Hollywood’s biggest names and escaped with valuable items, leaving puzzled neighbors wondering who’s next.

With every heist, the number of entertainers and athletes burglarized grew to include a who’s who of Los Angeles, from singers Rihanna and Christina Milian, to baseball player Yasiel Puig and football player Robert Woods.

Investigators now say what seemed like a string of random burglaries targeting celebrities is part of a gang operation. Suspects picked the homes based on social media postings and celebrities’ travel schedules.

According to CNN, police arrested three teens and a 34-year-old woman in connection with the burglaries.