Russian special forces walked inside a gas pipeline to strike Ukrainian units from the rear in the Kursk region, Ukraine’s military and Russian war bloggers reported, as Moscow claimed fresh gains in its push to recapture parts of the border province that Kyiv seized in a shock offensive.

Some Russian soldiers crawled through the pipeline and waited several days for orders to attack, a Russian military blogger said.

MOSCOW (Reuters) - Russia was storming the town of Sudzha on Sunday after special forces used a gas pipeline to surprise Ukrainian units as part of a major offensive to eject Ukrainian soldiers from the western Russian region of Kursk, pro-Russian war bloggers said.