"According to another version of Barayev's death, the GRU decided to eliminate him after the suspicious death of FSB chief Vice-Admiral German Ugryumov, who allegedly provided cover for Barayev.In a well-prepared five-day operation, GRU agents recruited from Chechens in a blood feud with Barayev searched for him in Alkhan-Kala and then stormed a local FSB base where he ran for cover, killing an FSB agent in the process.