The hacked documents suggest the FBI is concerned that some people may be using the Ring or other intelligent bell to watch the police.
Newspapers describe a 2017 incident where someone from a distance was watching live footage of police preparing to serve a search warrant.
The information was found online by The Intercept among the hacked documents.
Earlier, privacy advocates raised concerns about data from doorbells being shared with police.
The hacked newspapers, collectively known as BlueLeaks, were stolen from more than 250 police websites, says BBC.
The document in question is a technical analysis bulletin, which provides an overview of opportunities and challenges for the police from home security systems and smart doorbells.
The 2017 incident describes how someone under investigation was able to “secretly monitor law enforcement activity while law enforcement was on the premises” and notify his neighbor and owner. Does not name the video doorbell brand used.
The Amazon Ring is one of the most popular, but there are a variety of companies that sell smart doorbells along with in-house surveillance equipment.
It’s an interesting twist on the history of the doorbell. There have previously been concerns about how much information from private cameras is being shared with police.
Amazon was criticized last year for partnering with at least 200 U.S. law enforcement agencies to allow surveillance through its Ring bells.
Under the partnership, police officers can ask clients to share crime-related videos and information in their areas.
At the time, the digital rights group War for the Future said it “undermined our democratic process and fundamental civil liberties.”
In the UK, Wiltshire police have set up a database of private doorbells and security cameras, and residents are being asked to register theirs.