Gas leaked from Nord Stream pipelines under the Baltic sea onSeptember 29, 2022. (Photo: AFP/TTXVN)

The federal police are investigating the explosions with the help of divers and special technology.

The German navy has sent a mine sweeper and a multi-purpose vessel to inspect the pipelines.

German Federal Minister of Justice Marco Buschmann said a criminal investigation of sabotage of the Nord Stream pipelines has been launched.