India has "secured" the release of its five nationals from pirates in Nigeria, External Affairs Minister Sushma Swaraj said today. The release was secured after intense efforts made by the government, sources said. "We have secured the release of 5 Indian sailors from pirates in Nigeria. Our thanks to the President of Nigeria. I appreciate the good work done by our High Commissioner Ghanshyam," Swaraj said. The sailors were kidnapped in Warri, Nigeria on December 11 after which Swaraj had sought a report and Indian High Commissioner in Nigeria A R Ghanshyam met President of Nigeria on December 12.