Michigan Rep. Debbie Dingell penned letters to the CEOs of Amazon and Google requesting information about recent reports that found apps used by smart speakers can “eavesdrop” on users.

Earlier this week, Security Research Labs (SRLabs), a Berlin-based cybersecurity firm, released a report describing how simple it was to create apps that can “eavesdrop” on users. The firm created fake horoscope apps that had the ability to record conversations and phish for passwords using vocal searches.