Russian President Vladimir Putin has dismissed allegations that Ukrainians were behind the explosions that damaged the Nord Stream gas pipelines in the Baltic Sea last year, saying the United States may have been responsible.
German media previously reported that investigators believed a yacht, hired by a Ukrainian-owned company in Poland, was used to carry out the attack carried out by five men and a woman.
However, German federal prosecutors have not confirmed the findings.
Russian President Vladimir Putin has suggested that the United States was responsible for the blasts that damaged the Nord Stream gas pipelines in the Baltic Sea last year, dismissing allegations that Ukrainians were involved.
This follows media reports citing unidentified US and other officials claiming that there was evidence of Ukrainian involvement in the attack.
German media previously reported that investigators believed a yacht, hired by a Ukrainian-owned company in Poland, was used to carry out the attack carried out by five men and a woman.
However, German federal prosecutors have not confirmed the findings.
President Putin claimed that the US had a motive to carry out the attack, saying it wanted to halt the supplies of cheap Russian natural gas to Europe and provide more expensive liquefied natural gas.
He insisted that such an explosion, which was so powerful and at such depth, could only be conducted by experts backed by a state that had relevant technologies.
Germany's Die Zeit newspaper and German public broadcasters ARD and SWR reported that investigators believed that five men and a woman used a yacht hired by a Ukrainian-owned company in Poland to carry out the attack.
German federal prosecutors confirmed that a boat was searched in January but have not confirmed the reported findings.
The Ukrainian government has also denied any involvement in the attack.