Two individuals, including the captain, have been detained by the Ulsan Coast Guard following a recent ship collision off the coast of Busan that resulted in one death and two missing persons. The incident, details of which are still emerging, prompted an investigation into the cause of the collision. Authorities have taken the captain and another officer into custody for questioning related to the accident. Search and rescue operations continue for the two individuals who remain unaccounted for. The Ulsan Coast Guard is leading the investigation, focusing on potential negligence or violations of maritime regulations. Further information regarding the vessels involved and the circumstances surrounding the collision is expected to be released as the investigation progresses.