'Rogue' US soldier kills Afghan civilians
A US soldier in Afghanistan has killed at least 16 civilians in Kandahar province after suffering a breakdown, officials say.
He left his military base in the early hours of the morning and opened fire after entering local homes; women and children are said to be among the dead.
Nato said it was investigating the "deeply regrettable incident".
Bilal Sarwary reports from Kabul.