Apple Inc (NASDAQ:AAPL) is being sued by two women who say AirTags were used to stalk them.
The small trackers are designed to be placed on wallets or keys, to prevent them from being lost.
However, earlier this year the BBC reported that several women had found unwanted AirTags tracking them.
Previously, the company has said that its AirTags contain several measures that prevent unwanted tracking.
The lawsuit was filed in a San Francisco federal court and the two women say the AirTags were used by their former partners to track them down.
They also argue that AirTags have been linked to murders this year of women in Akron, Ohio and Indianapolis.
Apple has long been aware, before it released AirTags, that they could be used for criminal activity. On releasing them, Apple said that "AirTags are designed to track items not people".
The devices use a bluetooth signal which can be detected by Apple's Find My Network.
The company said it has created a series of safeguards that protect people from being tracked.