Russian state television has shown video of two U.S. military veterans who went missing last week while fighting in Ukraine.

The videos confirm that the men were taken captive and raise fears about their fate.

Alex Drueke and Andy Huynh, both from Alabama, are believed to be the first Americans captured by Russian forces since the war began on Feb. 24.

Drueke is shown on camera telling his mother he is alive.

Russian RT, which broadcasts in English, says the Americans are being held by Russian-backed separatist forces in the Donbas region of eastern Ukraine.