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Mikhail Vedernikov, governor of the Russian Pskov region, said an oil pipeline adminstartion building was left damaged after being attacked by two drones. 

The governor didn't explicitly accuse Kiev of the attack. However, Moscow has previously accused Kiev of similar attacks on targets along Russia's western borders. 

"Provisionally, the building was damaged as a result of an attack by two unmanned aerial vehicles," Vedernikov said, noting that there were no civilian casualties.

On their part, Kiev has not publicly claimed the attack nor any other prior drone attack on Russia however senior Ukrainian officials have recurrently welcomed the news of drone attacks against Russian territory. y

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Earlier this week, German news outlet Der Spiegel reported that indications of Ukraine's involvement in the sabotage operation on the Nord Stream gas pipelines are increasing. 

As per the report, the evidence pointing to such a connection was identified via metadata from emails used to rent a sailboat suspected to have been used to carry out the operation. 

According to an investigation conducted by various broadcasters and media partners, the CEO of the company through which the sailboat was rented happens to reside in Kiev.

The joint report added that a Ukrainian man in his twenties with ties to Kiev's armed forces may have been part of the group who hired the sailboat to carry out the attack.

Der Spiegel noted that the many clues to Ukraine were corresponding to observations made by several intelligence agencies, adding that the latter examined whether the sabotage operation was carried out by an independent Ukrainian group or a government-backed unit. 

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