In view of the very serious consequences, DMAIB immediately started an investigation. It was, however, not possible to gain access to the ship to investigate and document the accident site until 9 July when the ship was alongside in Haldia, India. The purpose of the investigation was to establish the circumstances that led to the death of the technicians.
https://dmaib.com/Media/638088635560435483/NORD_MAGIC_Occupational_accident_on_17_June_2022.pdf