WASHINGTON—Lawmakers introduced a bill Thursday to ban DeepSeek’s chatbot application from government-owned devices, over new security concerns that the app could provide user information to the Chinese government.

Researchers linked the AI chatbot to a Chinese state-owned telecommunications company, which has been banned from operating in the U.S.

The website of the Chinese artificial intelligence company DeepSeek, whose chatbot became the most downloaded app in the United States, has computer code that could send some user login information to a Chinese state-owned telecommunications company that has been barred from operating in the United States,