Costa Rican authorities have discovered cocaine concealed on a CP Offen boxship.

The BS Noticias daily said 47 kilos were hidden on the 1,819-teu Cap Palmerston (built 2007) in a 'parasite', a device used by gangs to hide narcotics.

The vessel was anchored in Puntarenas at the time.

Divers found the drugs on 13 January. They are thought to come from Colombia.