Alphabet Inc's Google is investigating a member of its ethical AI team and has locked the corporate account linked to that person after finding that thousands of files were retrieved from its server and shared with external accounts, the company said on Wednesday.

Axios, which first reported the latest investigation around a member of Google's AI team, said Margaret Mitchell had been using automated scripts to look through her messages to find examples showing discriminatory treatment of Timnit Gebru, a former employee in the AI team who was fired...