KABUL: The Taliban has released a video purporting to show US soldier Bowe Robert Bergdahl who was captured in Afghanistan almost six months ago.

The video has not been verified, but shows a man wearing sunglasses and a US military-style helmet and uniform. He appears healthy and speaks calmly and clearly, and does not appear to be under duress, the AP news agency said.

Bergdahl, a 23-year-old US airborne infantryman, was captured by the Afghan Taliban in Paktika province on 30 June.

The insurgents also released a video of him a few weeks after he was captured.

In the video, Bergdahl gives identifying details about himself such as his rank, date and place of birth, and deployment details. “This is just going to be the next Vietnam unless the American people stand up and stop all this nonsense,” he says.

There was no immediate comment from the US military or NATO forces in Afghanistan. The Pentagon has said Bergdahl was serving with an Alaska-based infantry regiment.