The Irish Data Protection Commissioner is set to investigate a complaint filed by Max Schrems, an Austrian law student and data privacy advocate who claims that Facebook Ireland is revealing his personal information to U.S. intelligence agencies, said the Irish Times. Schrems allegation: The social media giant gave the National Security Agency a backdoor for reviewing user data (a claim Facebook denies).

Schrems took Ireland’s data regulator to court after it turned down his complaint and later dismissed his Facebook data privacy claims as “frivolous and vexatious,” according to news sources.