HONG KONG — A K-pop singer apologized on Wednesday for filming and sharing intimate videos of women without their consent as South Korea reckoned with a widening inquiry centered on another celebrity’s misconduct at Seoul nightclubs.

The Seoul police say the singer, Jung Joon-young, 30, is suspected of violating sexual violence laws that prohibit the non-consensual filming and sharing of intimate videos. He was met by investigators on Tuesday at Incheon International Airport after he arrived on a flight from Los Angeles, where he had been filming a televised variety show.

In a written statement shared by his agency, MAKEUS Entertainment, on Wednesday, Mr. Jung admitted to illicitly filming women and sharing the videos in group chats online.

“I kneel down to apologize to the women who appear in the videos,” he wrote, adding that he would withdraw from the entertainment scene and repent his “unethical and unlawful acts” for the rest of his life.