People walk behind a logo of Meta Platforms company, during a conference in Mumbai, India, September 20, 2023. REUTERS/Francis Mascarenhas

BRUSSELS, Dec 4 (Reuters) - U.S. tech giant Meta is set to face a European Union antitrust investigation into use of artificial intelligence in its chat platform Whatsapp, a source told Reuters.

The investigation could come on Thursday, the source said.

(Reporting by Foo Yun Chee, Inti Landauro;Editing by Sudip Kar-Gupta)