A Greek-operated oil tanker seized off Togo was tracked down on Wednesday off the coast of Nigeria under the control of pirates, Reuters cited the ship's operator and Togolese authorities as saying. "The vessel is presently sailing off the coast of Nigeria under the control of pirates who have the intention to steal the cargo," Golden Energy Management said in a statement. The firm said it was in touch with a French naval ship that was nearby and that the crew are believed to be in good health and unharmed. Russia's Foreign Ministry said 23 Russian crew were aboard the tanker and added there was no immediate threat to their lives. It said the tanker was carrying some 50,000 tonnes of diesel and petrol fuel. The Greek coast guard said earlier on Wednesday that 24 people were on board the tanker. -- SPA