In a pro-ISIS video uploaded to YouTube:
“By Allah, when we received the news from the brothers, we greatly rejoiced, many brothers were very glad. First and foremost, you have fulfilled your duty before Allah and all the brothers say, ‘Salam aleikum’ (greetings) to you.”“Russian Citizen Linked To Lopota Gorge Incident Now Heads IS Battalion In Syria,” RFERL, February 25, 2015, http://www.rferl.mobi/a/russia-lopota-gorge-incident-islamic-state-syria/26869379.html.