Kate Clark, at the Afghanistan Analysts Network, reports that in the south-east, the insurgents' quasi-legal structures for establishing the guilt of alleged spies have largely been abandoned in favour of summary executions.

ECONOMIST: Afghanistan and the Taliban

The BBC's Afghanistan correspondent, Kate Clark, says that the behaviour of the Taleban's religious police is also an issue as they have recently arrested several Afghans working for the UN and raided two NGO clinics and a hospital.

BBC: UN threat to Afghan operations