It is unclear why pipes for the construction of the South Stream gas pipeline keep arriving in Bulgaria, the website EurActiv writes.
The Brussels-based outlet cites a report from Dnevnik.bg, a Bulgarian news website, about a vessel carrying a Bahamas flag which was stuck in shallow water at the Bulgarian port of Burgas.
The ship seems to have transported pipes for the South Stream project, which was abandoned in December 2014 after an announcement from Russian President Vladimir Putin.
South Stream was designed to carry 63 billion cubic meters of gas a year to Central Europe via Bulgaria and Serbia.
Early in December Putin cited Bulgaria's reluctance to go on with the pipeline and issue the necessary permits as a reason to put an end to the project.
Bulgaria, however, is now seeking to put forward an "altered" version including the construction of a gas hub where the pipe was meant to land on Bulgarian soil, an idea which has so far been neither approved nor rejected by Moscow.