歐洲新聞：俄國士兵在 Kursk 爬的那個天然氣管道，直徑是 1.4 米，長度是 15 公裏。（鏈接，原文）

https://www.euronews.com/2025/03/09/russia-soldiers-launched-surprise-attack-in-kursk-through-gas-pipeline

Russian forces crawled through a 1.4-metre-wide unused gas pipeline to attack Ukrainian troops in Sudzha in Russia's Kursk region, Ukraine’s General Staff confirmed.

Russian soldiers walked about 15 kilometres inside the pipeline.

Some Russian troops had spent several days in the pipe before striking Ukrainian units from the rear near the town of Sudzha.