The Hyogo Prefectural Police on Sunday arrested Takashi Tachibana, head of a political group that criticizes NHK, in a libel case in which the victim, a former Hyogo Prefectural Assembly member, apparently committed suicide in January.

Tachibana is suspected of disseminating false information about the victim, Hideaki Takeuchi, who served on the prefectural assembly's special investigation committee regarding a scandal involving Hyogo Gov. Motohiko Saito.

It is unknown whether Tachibana, 58, has admitted to the suspected libel.