A painting showing the Nord Stream pipelines is displayed on a container near the Nord Stream 1 Baltic Sea pipeline in Lubmin, Germany, July 20, 2022. (AP)

Sources familiar with the investigation into the Nord Stream gas pipeline explosions have confirmed media reports that traces lead to Ukraine, Sputnik reported.

German media, ZDF and Der Spiegel, said that there is no evidence of Russia's involvement in the pipeline explosions.

The news outlets added that there is growing evidence that agents linked to Ukraine may be behind the attacks on the Nord Stream pipelines. The news outlets noted that they were in Ukraine before and after the explosions in the Baltic Sea, citing technical data.

In June, a report by The Washington Post said the CIA knew through a European spy agency, three months before the sabotage attack, that members of a Ukrainian special operations team intended to blow up the NordStream pipeline.

The yacht involved, according to the investigators, was loaded with explosives and made a deviation from its original route into Polish waters from the Danish island of Christianso.

The Federal Prosecutor's Office of Germany confirmed last March that searches had been carried out on a ship that was carrying explosives to blow up the Nord Stream gas pipelines.

Read more: Ukraine likely behind Nord Stream pipeline sabotage: German Media