Russian ships able to perform underwater operations were present near to where explosions later took place on the Nord Stream pipelines, according to an investigative documentary. The vessels were reportedly located using intercepted Russian navy communications. Underwater explosions last September knocked the two Nord Stream pipelines - built to carry gas from Russia to Europe - out of action. The cause of the blasts is unclear. Please subscribe here: bit.ly/1rbfUog #NordStream #Russia #BBCNews