Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. October 11, 2011 Pirates Seize Tanker off Nigerian Coast VOA News Suspected pirates surrender Japanese-owned oil tanker in the Arabian Sea, March 2011 (file photo). Photo: AP Suspected pirates surrender Japanese-owned oil tanker in the Arabian Sea, March 2011 (file photo). The International Maritime Bureau says pirates have seized a chemical tanker and kidnapped its crew off the coast of Nigeria. IMB official Cyrus Mody said Tuesday the pirates attacked the Marshall islands-flagged vessel on Saturday about 145 kilometers south of Lagos, Nigeria's commercial capital. Mody said the ship is still under pirate control, but he believes all crew members are okay. It is not known how many people are on board the ship. Pirates have been carrying out attacks in West Africa's Gulf of Guinea with greater frequency, often targeting vessels carrying oil from Nigeria's oil-rich southern Delta. Pirates recently hijacked several vessels off the coast of Benin, including at least two oil tankers. In June, the International Maritime Bureau issued a piracy warning for ships traveling near Benin. Some information for this report was provided by AP, AFP and Reuters. .