 Interfax, however, refuted Muhannad's death the same day, saying it was a different militant.Dokka Umarov later appeared on video with Muhannad to refute statements of his death, calling them lies and propaganda.According to different sources, Muhannad took part in attacks on Russian security forces in eastern Chechnya in 2008 and in western Chechnya along the border with Ingushetia in 2009.