By Henry Austin and Jamieson Lesko

U.S.-led forces in Afghanistan are investigating Taliban claims that they have captured a dog from a military unit.

Militants released video Thursday showing a dog they claim to have captured from American forces fighting in Afghanistan.

The U.S.-led International Assistance Security Force confirmed a dog had gone missing. The nationality of the dog was unclear, with U.S. military officials in Washington saying it belonged to a British unit. Britain’s Ministry of Defence said it was still investigating.