DeepSeek’s popularity has surged in the past week. It has become the most downloaded app on the App Store, surpassing even ChatGPT.

At least one body of the US government has officially banned the use of Chinese AI chatbot DeepSeek among its staff. This week, the US Navy handed down the ban, barring its members and servicemen and women from using the app for personal and work-related tasks, citing “security and ethical concerns” as the reasoning behind the ban.

The U.S. Navy issued a warning to its members to avoid using DeepSeek “in any capacity,” due to “potential security and ethical concerns.”