A 3D printed Apple logo is seen in front of a displayed stock graph in this illustration taken April 28, 2016. REUTERS/Dado Ruvic/Illustration/File Photo

SEOUL (Reuters) - South Korea's Fair Trade Commission (FTC) is investigating "some matters" relating to tech giant Apple Inc AAPL.O, the head of the anticompetition body said during a parliamentary hearing, without disclosing further details.

Speaking at the hearing on Tuesday, FTC Chairman Jeong Jae-chan declined to comment on the specifics of the regulator’s investigation when asked to do so by a South Korean lawmaker.

Domestic media reports said earlier this month the FTC was reviewing details of the U.S. firm’s contracts with South Korean mobile telecoms carriers.

Apple didn’t immediately respond to a Reuters request for comment.