In most cases, the pirates demand a ransom for captured vessels and crew members.
The pirates took hostage seven Russian and one Ukrainian sailor in the territorial waters of Nigeria.
Russian diplomats have appealed to the Nigerian authorities asking for assistance in locating sailors.
In a message posted on the website of the Russian foreign Ministry said that the ship “BBC Caribbean”, the crew which consisted of Russians, belongs to a German company Briese Schiffahrts.
In the territorial waters of Nigeria witnessed several attacks on foreign ships.
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