Russian lieutenant Lev Stupnikov is reported to have used his position in the Russian army to pass sensitive military information to Ukraine, including details on troop locations and battle plans. Multiple outlets say the intelligence he provided helped Ukrainian forces carry out targeted attacks that resulted in the deaths of more than 300 Russian troops and included sabotage of Russian weapons systems.
The reports describe Stupnikov as having accessed information tied to reconnaissance and surveillance, such as drone feeds and camera information, which then informed Ukrainian operations. After carrying out the alleged leak and sabotage, he is said to have escaped rather than remaining in Russia. One outlet reports that he fled to Kyiv, while another characterizes his move as an escape to the Russian Volunteer Corps, framing it as opposition to the leadership under President Vladimir Putin. The accounts attribute the details to reporting on his defection and activities, but do not provide independent verification within the summaries.