U.S. forces were in helicopter crash in southern Afghanistan . Pentagon received report that troops came under mortar fire after crash . Later in the day , questions surfaced about whether the troops may have actually survived the crash and then came under mortar fire . The incident occurred on the outskirts of Kandahar city. Tuesday 's toll worst single-day for U.S. troops since August 2012 .
U.S. forces were in helicopter crash in southern Afghanistan . Pentagon received report that troops came under mortar fire after crash . The incident occurred on the outskirts of Kandahar city. Tuesday 's toll worst single-day for U.S. troops since August 2012 .