The European Commission says that it is carrying out unannounced inspections at the premises of a company active in the vaccines sector.
It did not name the company involved.
The commission said that it had concerns that the company might have violated EU competition rules that prohibit abuses of a dominant market position.
“In particular, the commission is investigating possible exclusionary practices that may amount to anti-competitive disparagement,” it added in a statement.
Representatives from the relevant national competition authorities accompanied the EU body on the inspections.
The commission has stressed that unannounced inspections are a preliminary investigative step into suspected anti-competitive practices and do not mean that the company in question is guilty of anti-competitive behaviour.