NEW YORK - US ammunition and assault rifles supplied to Afghan troops are finding their way into the hands of Taliban militants, enabling them to fight an insurgency for years against materially superior US-led forces, a media report said on Wednesday. A study of ammunition markings of 30 rifles recently seized from Taliban militia in Korngal valley suggests that munitions procured by the Pentagon have leaked from Afghan forces for use against US troops, the New York Times reported. Although 'the scope of that diversion remains unknown, the newspaper warned that 'poor discipline and outright corruption among Afghan forces may have helped insurgents stay supplied in the wake of 'only spotty US and Afghan controls of weapons and ammunition sent to Afghanistan. Following criticism for failing to account for thousands of rifles provided to Afghan security forces, some of which have been found in the hands of militants, the Pentagon launched a database documenting small arms supplied to Afghan units. And the US-led Combined Security Transition Command Afghanistan, which is responsible for training and supplying Afghan forces, has said it has prioritised accounting for all Afghan military and police property. 'The emphasis from our perspective is on accountability of all logistics property, the transition commands deputy chief, Brigadier General Anthony Ierardi told the newspaper. Leakage of Pentagon-supplied armaments to insurgents is an 'absolutely worst-case scenario, he said. But no similar system of accountability is applied to ammunition, which is more difficult to trace than firearms. Military officers told the newspaper that US forces do not examine all captured arms and munitions to determine how they fell into the hands of insurgents and whether the Afghan govt was supplying even indirectly the Taliban. The reasons for the gap, according to The Times, owed to 'limited resources and institutional memory of issued arms, as well as an absence of collaboration between field units that collect equipment and the investigators and supervisers in Kabul who could trace it.