The European Union is investigating packaging paper manufacturers Mondi and BillerudKorsnas as part of an anti-trust probe, both companies confirmed Wednesday.
The action by the European Commission, the EU's executive body, is focused on certain types of packaging paper and industrial bags, said Mondi, whose European headquarters in Vienna were searched on Tuesday.
The EU Commission said it had inspected companies in several EU countries on suspicion that they violated rules which ban price fixing or allocating customers among producers.
"Mondi is committed to complying with all applicable competition laws and is not aware of any wrongdoing or contravention of the relevant legislation," the British-South African company said.
Mondi and Swedish competitor BillerudKorsnas both said they were cooperating with the EU probe.
EU market investigators had already searched several makers of kraft paper and industrial packaging last year.