Taliban tighten grip on Afghan city of Kunduz - BBC News:
The capture of the Bala Hisar fortress came despite efforts by government reinforcements, backed by Nato airstrikes and special forces, to retake the city.
It leaves the airport as the army's last stronghold.
The Taliban overran Kunduz on Monday, their biggest military gain since they lost power in 2001.
The Taliban had blockaded the Bala Hisar fortress for two days.