"The Commission is concerned that the proposed acquisition may reduce competition on a number of markets across the entire book value chain in French-speaking countries of the European Economic Area (EEA) and in a segment of magazine publishing in France," EU's watchdog said in a statement.
Reuters had reported this EU antitrust investigation earlier this month.
The Commission now has until 19 April 2023, to take a decision.
(Reporting by Benoit Van Overstraeten; Editing by Geert De Clercq and Tassilo Hummel)