Denmark invites Nord Stream owner to recover mystery object

Denmark has invited the Russian-controlled operator of the Nord Stream 2 pipeline to help recover a mystery object that was spotted near the pipeline, six months after sections were sabotaged.

Russian President Vladimir Putin, who revealed the discovery of the object earlier this month, said experts believe that it could be a signal antenna to activate an explosive in that part of the pipeline.

German, Swedish and Danish authorities are investigating the undersea explosions that sparked four leaks on the two Nord Stream pipelines in the Baltic Sea in September, seven months after Russia invaded Ukraine.

The Danish energy agency released a photo late on March 23 of the cylindrical object standing near the Nord Stream 2 pipeline at the bottom of the sea.

The agency said it is "possible" that the object is a maritime smoke buoy, 40 centimeters tall and 10 cm wide, and that it "does not pose an immediate safety risk."

"With a view to further clarifying the nature of the object, Danish authorities have decided to salvage the object with assistance from the Danish Defense," it said in a statement.

The agency added that it was still waiting for a response from the pipeline's owner before starting the recovery operation.

Russian energy giant Gazprom holds a majority stake in the twin pipelines, with the rest owned by German, Dutch and French companies.