**North Korea has freed a South Korean worker arrested in March at a joint industrial zone near the border, a South Korean official has said.**A spokesman for the unification ministry said the worker was handed over to employees of his company, Hyundai Asian.
The worker, who is known only by his family name Yoo, was accused of undermining the North Korean system.
North-South Korean relations have been severely strained in recent months.
Much of Hyundai’s work inside the North was suspended after Mr Yoo was arrested.
Earlier this week the head of Hyundai Group held two days of talks in North Korea to try to resolve the case.