Amazon is investigating three of its engineers after they testified before the Seattle City Council about regulating the expansion of AI and large data centers. The employees—identified across reports as Patrick Schloesser, Darius Irani and Liesl Wigand—spoke in favor of adding conditions to future data center approvals during hearings that took place as city officials considered a pause in new construction. CNBC and other outlets report that five Amazon employees testified, and that the company’s internal scrutiny focused on three of them after the public comments drew attention.

The workers say they were questioned by Amazon and were told they were under investigation, with concerns that the company could discipline them, including potential termination in at least one case. They argue that the investigations are meant to intimidate them for political speech and public advocacy. Amazon says it launched internal reviews to determine whether the employees appeared to speak on the company’s behalf rather than as private citizens, and that it does not allow retaliatory behavior. The city, meanwhile, votes to pause construction of new, large data centers for one year while it develops regulations.