Russia says it is vital to identify an object discovered next to one of the Nord Stream pipelines and said that the current investigation into blasts that struck the pipelines last September must be conducted with full transparency.

Kremlin spokesman Dmitry Peskov also told reporters it was a positive sign that Denmark had invited the Russian-controlled operator of the Nord Stream 2 pipeline to help salvage an unidentified object found close to the Baltic Sea pipelines.

Last week, Danish authorities said a tubular object, protruding around 40 cm (16 inches) from the seabed and 10 cm in diameter, had been found during an inspection of the last remaining intact Nord Stream pipeline by its operator, Nord Stream 2 AG.

The object found near the pipeline/Photo: Twitter

Three of the four pipelines of the Nord Stream 1 and Nord Stream 2 gas links were hit in a still-unexplained explosion last September.

Russia has, without evidence, blamed Britain and the United States for the blasts, while investigators in Europe have not said who they believe was responsible.