“There are reports of another American whose whereabouts are unknown.
I can’t give specifics yet… We understand that this person went to Ukraine to participate in hostilities,” Price said.
He also said that the United States saw reports of the missing two Americans in Ukraine, and Washington is currently in contact with the Ukrainian government on this issue.
According to the British newspaper The Telegraph, we are talking about 39-year-old Alexander Druk and 27-year-old Andy Hune, who "served as volunteers."