DeepSeek could not be accessed on Wednesday in Apple or Google app stores in Italy, the day after the authority, known also as the Garante, requested information on its use of personal data.
The authority's measure - aimed at protecting Italian users' data - came after the Chinese companies that supply chatbot service to DeepSeek provided information that "was considered to totally insufficient," the authority said in a note on its website.
The Garante added that the decision had "immediate effect" and that it had also opened an investigation.
Reuters could not immediately reach DeepSeek for a comment.
(Reporting by Sara Rossi; Editing by Andrew Cawthorne and Sandra Maler)

Deepseek logo is seen in this illustration taken January 27, 2025. REUTERS/Dado Ruvic/Illustration