South Korea's air force chief resigned on Friday, apologising and taking responsibility for the death of a member of the force who took her own life, according to her family, after being sexually harassed by a colleague.

Lee Seong-yong (above) offered to step down a day after an air force master sergeant was arrested on charges of molesting and injuring a female colleague of the same rank in March.

The family of the victim said she had suffered mental distress and persistent bullying, and accused the air force of trying to...