On Monday, Russian state energy giant Gazprom noted that gas leakage had ceased on three of the four sabotaged underseas pipelines of the Nord Stream 1 and Nord Stream 2 natural gas pipelines, and that the fourth line, one of two Nord Stream 2 undersea lines, appeared to be undamaged in the attacks, and could resume gas deliveries to Germany, if Germany so chose.

Europe has launched major investigations after seismologists registered explosions at the locations of thtee major leaks from the undersea gas lines. Sweden has cordoned off the area around one leak, and brought in a special deep sea submersible to begin investigations. Germany, Denmark and Sweden all have said they believe the damage was due to sabotage.

Gazprom has said that although there was a loss of pressure and apparent damage to both Nordstream 1’s “A” and “B” lines, as well as Nord Stream 2’s “A” line, the Nord Stream 2 “B” line appears undamaged, and could be used to deliver gas supplies to Germany.

Over the weekend, Russian Deputy Prime Minister Aleksandr Novak said that it was believed the sabotaged lines could be repaired, however it would take time and expense. Other experts have speculated repairs would need to be done as quickly as possible to avoid further damage from sea water leaking into the pipes and corroding the steel they are constructed of.

Nord Stream 1 had been fully functional earlier in the year, before a series of technical problems combined with Western sanctions preventing their repair, caused Russia to shut down deliveries through the pipeline. Nord Stream 2 had been fully constructed and primed for operation, however bureaucratic and political snafus in Germany had stalled its official authorization and opening.

Gazprom noted, “If a decision is made to start deliveries through Nord Stream 2’s line B, natural gas will be pumped into the pipeline after the integrity of the system has been checked and verified by supervisory authorities.”