The Nigerian Safety Investigation Bureau (NSIB) has launched an investigation into a May 20, 2026, collision between the container vessel MV Maersk Valparaiso and the oil tanker MT Lady Martina at Bonny Anchorage, Rivers State. Classified as a “Very Serious Marine Casualty,” the incident caused injuries to five crew members and an oil spill. NSIB investigators have boarded both vessels to collect evidence, including navigational data from the Maersk Valparaiso, and have engaged the Transport Safety Investigation Bureau of Singapore. Authorities have urged the public to avoid speculation as they work to determine the cause and environmental impact of the grounding.