Inside the shadowy world of anti-Putin sabotage from within Russia

What happened: Two Russian men secretly working for Ukraine's intelligence services gave rare accounts to a BBC World Service documentary of operations targeting military assets and personnel inside Russia. Why it matters: The men say they oppose Putin's regime and believe it could fall if Russia loses the war. The GUR and the men are cautious about sharing detail, making it impossible to verify their claimed activities.

Two Russian men secretly working for Ukraine's intelligence services gave rare accounts to a BBC World Service documentary of operations targeting military assets and personnel inside Russia.

The men say they oppose Putin's regime and believe it could fall if Russia loses the war. The GUR and the men are cautious about sharing detail, making it impossible to verify their claimed activities.