Spanish police seized four tonnes of cocaine aboard a ship off the northwest coast of Spain.
Eleven people were arrested in the operation, carried out on Saturday in conjunction with drug enforcement authorities from the United States and Britain, a ministry statement said.
Six of the detainees were arrested aboard the ship, three in Madrid and two more in the northwest region of Galicia.
Police also seized US$27,000 (EUR20,000) and several cars and cell phones.
Russian President Vladimir Putin, in his speech dedicated to the Day of the Russian Navy, recalled the threats that Russia is currently facing from a number of countries.