In the convoy shooting, U.S. forces spokesman Jamie Graybeal said the Afghan driver failed to heed instructions to stop as his truck came close to the American convoy near Kabul.

NPR: Insider Attack Kills 2 US Troops, 2 Afghans

"We continue to work out the details on the transfer of the Detention Facility in Parwan to the government of the Islamic Republic of Afghanistan, " Jamie Graybeal, a spokesman for the U.S. military in Afghanistan, said in an email.

NPR: Transfer Of US Prison To Afghans Delayed Again