During a film teaser that aired on the Russian television channel Rossiya 1 on Sunday, Ramzan Kadyrov said Chechen special forces are fighting against the so-called Islamic State in Syria and have even infiltrated the group's ranks.
Kadyrov added that many extremist training camps were started by members of NATO states.
The Kremlin declined to comment on Kadyrov's claims.
Over 500 Chechen fighters are said to be fighting with IS in Syria. In the past, Kadyrov has offered Chechen fighters as ground troops in Syria.
