Addtheed the desire to fight. it is a youunified force. reporter: james vasquez told cnn he was moving around loosely. right now, me and a british soldier have been going from unit to unit where we re needed the most. reporter: but u.s. officials are again warning americans don t go to ukraine to fight. this is an active war zone, this is not the place to be traveling to. reporter: state department officials say russian forces could single out americans fighting in ukraine, one official warning that captured americans could be subject to heightened risk of mistreatment. it is not hard to imagine a situation in way american soldier is tortured, executed on the battlefield or tent back to moscow to be some type of pawn
And u.s. officials say that they don t have an exact count of how many americans are fighting in ukraine. ukrainian defense official told cnn in early march that at that time more than 20,000 people from more than 50 countries had expressed a desire to join the fight. cnn has interviewed some americans who volunteered. former tv analyst malcolm nance described fighting in a special ukrainian unit called the international legion. it is not just people running around grabbing rifles and going on the battlefield. it is a unified force that is a component of the ukrainian army key empl deployed on the battle front. reporter: but james vasquez says he was moving around loosely. i m pretty much a ghost. me and a british soldier, him and i have been going unit to unit, you know, wherever needed the most. reporter: but u.s. officials are again warning americans don t go to ukraine to fight. this is an active warzone, this is not the place to be
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