“The unprecedented nature of this event (it seems that this is some kind of terrorist act, possibly at the state level), of course, requires very active, energetic cooperation,” Peskov said.
He stressed that this "extremely dangerous situation" requires "urgent investigation."
Earlier, the Russian embassy in the United States said that Russia insists on an objective investigation of the Nord Stream incident.
According to Swedish Foreign Minister Ann Linde, the incidents with gas leakage occurred as a result of explosions.
The location of physical damage to both Nord Stream lines has been determined; they are located in the exclusive economic zone of Denmark and Sweden.
It is impossible to estimate the timing of the resumption of the operation of the gas pipeline.