They also reveal, and an Amazon spokesperson confirmed, that Amazon has hired Pinkerton operatives—from the notorious spy agency known for its union-busting activities—to gather intelligence on warehouse workers. The Pinkerton spies were posted in a Wroclaw warehouse known as WRO1, operated by the Amazon contractor ADECCO, to investigate the allegation, according to the Amazon report. Requests for risk assessments of Amazon warehouse sites are sent to the team by email, according to an email viewed by Motherboard. It has become typical for workers across Europe to stage mass strikes against Amazon between Black Friday and Christmas, when Amazon workers experience the highest injury rates and the workload becomes especially grueling. \"Potential labor initiatives at Amazon by traditional unions may constitute an attractive opportunity for SiCobas to attend and gain visibility,\" it continues, referencing an Italian labor union that has organized Amazon warehouse strikes on Black Friday.