Hacked documents suggest that the FBI is concerned some people may be using Ring or other smart doorbells to watch the police.
The papers describe a 2017 incident where someone remotely watched live footage of police preparing to serve a search warrant.
The information was found online by The Intercept among hacked documents.
Previously, privacy advocates have raised concerns about data from smart doorbells being shared with police.
It is an interesting twist on the smart doorbell story. Previously there have been concerns about how much information from private cameras is being shared with police.
Amazon was criticised last year for partnering with at least 200 US law enforcement agencies to allow surveillance via its Ring doorbells.