The French navy has revealed its biggest seizure of drugs at sea in the Gulf of Guinea.

The internationally coordinated operation resulted in the discovery of more than 6 tonnes of cocaine on the 4,400-dwt general cargoship Najlan (built 1992) on Sunday.

The move to intercept the vessel was led by France's Atlantic and Brest prosecutor's office, based on intelligence forwarded by the French anti-drug agency OFAST and the Dutch police.