NATO ponders future of Afghan mission as fatigue, frustration mount

NATO soldiers walk in front of a damaged NATO military vehicle at the site of a suicide car bomb blast in Kabul, Afghanistan, October 11, 2015. REUTERS/Ahmad Masood

KABUL/ZARAGOZA, Spain (Reuters) - NATO partners are considering ways of beefing up their training and assistance mission in Afghanistan as concern grows over the ability of local forces to fight an escalating insurgency by Taliban militants, according to officials in Brussels and Kabul.

The Taliban's success in seizing the northern city of Kunduz in late September and holding it for several days caused shock among Afghanistan's international partners, who have invested billions of dollars trying to create a security force capable of standing on its own.