One of two U.S. soldiers who went missing in Afghanistan was a captive of the Taliban and the other had been killed, a spokesman for the insurgents said on Sunday. Taliban would decide later on the fate of the captive, Zabihullah Mujahid told Reuters by phone from an undisclosed location. The two U.S. servicemen were reported missing on Friday after failing to return in a vehicle they had taken from their compound in Kabul, the NATO-led International Security Assistance Force (ISAF) said on Saturday.