Apple and Alphabet have raised concerns with e-commerce giant Amazon after children have accessed sexual images on its popular Kindle app, and urged the group to increase control over the content.

The warnings were prompted by questions posed by Reuters to representatives of the three companies about users’ ability through the Kindle app to access and view online material with nude photos, while some videos showed sexual acts.

Reuters became aware of the issue after two families reported that their teenage sons had downloaded material through Amazon’s Kindle Unlimited e-book subscription service and viewed color photographs on the Kindle iPhone app.

Pornographic material is also available from the Amazon Kindle online store and is displayed on versions of the Kindle app.

The parents, who declined to be named, told Reuters they were initially drawn to the $10-a-month service because it offered access to age-appropriate series of books that would otherwise be expensive to purchase and not available on the Kids+ subscription service. . Amazons.

“We are committed to ensuring the safety of shopping and reading for our customers and their families, and we take these issues seriously,” Amazon said in a statement to Reuters.

Three internet law experts interviewed by Reuters said Amazon is unlikely to face legal repercussions given the protection of the US Constitution’s First Amendment.

Kindle Unlimited for $10 a month offers users both self-published e-books and more traditional books from publishers. The service has grown in popularity with customers who want to read series such as The Hunger Games trilogy and other previous bestsellers such as The Handmaid’s Tale and King’s Gambit.

Kindle Unlimited has also spawned a small industry of games that cover a wide range of interests, including romance, from dinosaurs to aliens. Pornographic content can be found on the Amazon website without a subscription and can be purchased for as little as $2.99.

Source: Reuters.