Spanish authorities have found more cocaine hidden in the hold of a general cargoship that was at the centre of a drugs bust in Brazil three weeks ago.

A further 1,200 kg of the drug was discovered in millet on the 9,800-dwt Unispirit (built 2006) at Las Palmas in the Canary Islands, La Provincia reported.

The vessel docked at the Santa Catalina dock last week.

AIS data showed the Unispirit en route to Cadiz in Spain on Friday.

Brazilian police discovered 1,524 kg of cocaine in its hold in Sao Sebastiao on 2 October. It is unclear whether the latest find was missed in Brazil. The illegal consignment was found in 8,000 packets.

Crew free to go

No arrests have been made. The vessel has a crew of 12, including a Russian captain.

The ship had taken 12 days to arrive from Brazil.

The Brazilian raid arose from a routine inspection that found a brick of the drug inside a bag on the ship. No arrests were reported then either.

The seized drugs were taken to police headquarters in Sao Paulo for destruction.

German operator Held Bereederungs has not responded to TradeWinds' request for comment.

The incident once again highlights the problem of international drug gangs concealing narcotics on board merchant vessels, after a series of similar raids over the summer.