"A group of experts gathered by the Counter-Extremism Project believes the number of pro-Ukraine foreign fighters present in-country ranges from 'several hundred… to a few thousand.' Fighters from Eastern Europe and former Soviet republics still seem to constitute the bulk of arrivals, with Poland, Georgia, Belarus, Latvia, Lithuania and Romania among the most frequently mentioned in open sources as countries of origin."

"Security officials in Germany have visited known far-right extremists to warn them not to travel to fight in Ukraine. It is one method western states are using to discourage extremists from taking up arms amid fears returning right-wing fighters will pose a security threat. In a webinar hosted by the Counter Extremism Project, experts warned European nations to prepare for the fallout."

CEP Senior Director Dr. Hans-Jakob Schindler quoted: "Allerdings zieht der Ukraine-Krieg nicht nur Rechtsextremisten an. Hans-Jakob Schindler, Seniordirektor der Anti-Extremismus-Organisation Counter Extremism Project, beobachtet auch Bemühungen von Linksextremen aus Europa und den USA, am Krieg in der Ukraine teilzunehmen. Viele sympathisierten in diesem Lager auch hier mit der Ukraine. Kiew, so Schindler, rekrutiere Kämpfer unabhängig von ihrer Gesinnung und bringe ihnen den Umgang mit der Waffe bei. Das sei gefährlich, warnt der Terrorforscher: 'In der Ukraine erwerben Extremisten nun Fähigkeiten, die sie für die gewaltmäßige Umsetzung ihrer ideologischen Ziele benötigen.'"

"Gregory Waters, an analyst at the Counter Extremism Project and nonresident fellow at the Middle East Institute, said there are more than a dozen recruitment centres in Syria run by Moscow-backed private pro-government armed groups."