The United States has not yet confirmed an alleged capture of two American volunteers fighting in Ukraine by the  Russian military. However, stating that if the reports were true, they would take all measures to ensure their safe return.

Alexander Drueke, 39, and Andy Tai Ngoc Huynh, 27, are both US military veterans who had been living in Alabama and went to Ukraine to assist with war efforts.

Relatives have been in contact with Senate and House offices seeking information on the men’s whereabouts, Guardian reported.

White House spokesman John Kirby said he could not confirm the disappearance of the two Americans but suggested , "If it's true, we'll do everything we can to get them safely back home."

He noted that the US  authorities discouraged Americans from traveling to Ukraine.

"It is a war zone. It is combat. And if you feel passionate about supporting Ukraine, there's any number of other ways to do that that are safer and just as effective," Kirby told reporters.

Russia invaded Ukraine back in February of this year.

Hostilities have been in progress since then.