Finland's National Bureau of Investigation (NBI) has completed a preliminary investigation into the suspected smuggling of more than 200 kilograms of cocaine into the country.
According to the NBI, the drugs arrived at the Port of Helsinki in Vuosaari in March, hidden in a shipping container loaded with bottles of red wine.
Police said they managed to seize 37 kilograms of cocaine, meaning that most of the total suspected amount of the drug was not intercepted.
"The drugs were hidden in the container and retrieved before the container reached the right recipient," Detective Chief Inspector Marko Heinonen of Finland's National Bureau of Investigation (NBI) told news agency STT.
The case is still under preliminary investigation, but police have reported the main suspects have partially confessed to their involvement in the operation.
The main suspects in the case are a Swedish national and two Danish citizens. They are suspected of aggravated drug offences, and are being held in pre-trial custody while the preliminary investigation is ongoing.
One Dutch national and a Finnish citizen are also suspected of aggravated drug offences in relation to the case. All five suspects are men.
According to police, the street value of the suspected smuggled cocaine is more than 20 million euros, when calculated at 100 euros per gram. Some of the cocaine seized was of very high purity, around 90 percent, police noted.
Officials described the amount of cocaine imported into Finland as significant and rare.
"As a rule, such large consignments are sent directly to the Netherlands-Spain axis and then in smaller consignments to the Nordic countries," Detective Chief Inspector Heinonen explained.
The case has been passed on to prosecutors for consideration, with court proceedings expected to begin before midsummer, police said.