A Russian submarine support ship was photographed by the Danish navy near the site of the Nord Stream pipelines, shortly before the attack last September.
One of the latest stories comes from Germany where a Der Spiegel report claimed that a 15-meter chartered yacht may have been involved.
Putin, interviewed on Russian television, also said European leaders had been browbeaten into losing their sense of sovereignty and independence.
The Sept. 26 explosions on the pipelines connecting Russia and Germany occurred in the exclusive economic zones of Sweden and Denmark.
German authorities reportedly identified the boat used for the sabotage, which was rented with forged passports from a Poland-based company.
"Obviously, the authors of the attack want to divert attention. Obviously, this is a coordinated stuffing in the media," said Kremlin spokesman Dmitry Peskov
North Korea's state news backed an impartial investigation, saying the world needs to be aware of the "vicious coerciveness, war and conspiracy maneuvers of the United States."
Citing unidentified sources, a Pulitzer Prize-winning journalist said that US navy divers deliberately destroyed the pipelines with explosives.
Sweden had found traces of explosives but refused to share the data with Russia.
Swedish and Danish authorities are investigating four holes in the Nord Stream 1 and 2 pipelines which link Russia and Germany via the Baltic Sea and have become a flashpoint in the Ukraine crisis.
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