From the Wiki
The 2022 Nord Stream pipeline sabotage were a series of clandestine bombings and subsequent underwater gas leaks that occurred on the Nord Stream 1 and Nord Stream 2 natural gas pipelines on 26 September 2022. The sabotage happened as the Baltic Pipe was being opened for natural gas to come in from the North Sea through Denmark to Poland; however, the perpetrators' identities and the motives behind the sabotage remain debated. Both pipeline pairs were built to transport natural gas from Russia to Germany through the Baltic Sea, and are majority owned by the Russian majority state-owned gas company, Gazprom.
https://en.wikipedia.org/wiki/2022_Nord_Stream_pipeline_sabotage