Russia’s military had anticipated a possible Ukrainian incursion into the southwestern Kursk region for months, according to documents seen by The Guardian. Ukrainian troops crossed into the Kursk region on Aug.

Russian commanders anticipated that Ukraine was planning an incursion into Kursk Oblast months before it occurred, the Guardian reported on Sept. 20, citing a collection of documents that Ukrainian soldiers said they had seized from abandoned Russian positions.

According to documents obtained by the Ukrainian military and shared with The Guardian, Russia's military command foresaw Ukraine's August 6 incursion and failed to act on warnings from those in the region. Newsweek has contacted the Russian Ministry of Defense for comment on the reports.