The Liberian-flagged M/V Mozart was sailing from Lagos, Nigeria, to Cape Town, South Africa, when it was attacked on Jan. 23 about 100 nautical miles (185 kilometers) northwest of the island nation of Sao Tome and Principe.
One crew member, an Azerbaijani national, died during the attack. Three other Turkish sailors who avoided being kidnapped, returned to Turkey last month.
The Gulf of Guinea, off the coasts of Nigeria, Guinea, Togo, Benin and Cameroon, is the most dangerous sea in the world for piracy, according to the International Maritime Bureau.
In July 2019, 10 Turkish seamen were kidnapped off the coast of Nigeria. They were released less than a month later.