Comments by "jorge luis barrios mur" (@jorgebarriosmur) on "ISIS Attacker Confesses To Shooting Russians At Moscow Mall; Kremlin Says Suspects Are Foreigners" video.

This could be the reason the russian police got them so quickly. I mean, Telegram is a RUSSIAN firm, and I am willing to bet that despite the claims of it being otherwise, russian authorities have a backdoor to check the messages on Telegram, the same way USA surely has it in Watsup or the Chinese in Tik-Tok
1