Two Customs Surveillance patrol boats, the Sacre and the Halcón, set out on the night of 7 August 2021 and boarded a merchant vessel in the early hours of 8 August about 40 miles south-east of Fuerteventura in international waters.[1] The ship, the 38-year-old 4,800-deadweight-ton Natalia sailing under the flag of Palau, was in poor condition with leaks and an engine-room fire risk, and officers worked to keep her afloat into the port of Las Palmas.[1][2]

The boarding was the culmination of Operation Natalia, a joint Tax Agency and National Police investigation with France’s DNRED customs unit into a vessel that had left Turkey in July, changed its name and reflagged from Togo to Palau.[1][2] A search on 9 August found 638 bales holding 19,876 kilograms of hashish concealed in a declared cargo of plaster, plus 26 kilograms of marijuana in the crew accommodation.[1][2] The eleven crew members, all Syrian nationals, were arrested and referred to the National High Court.[1][2]