Pakistan action over 'Nato' attack

Pakistan blocked vital supply routes for US-led troops in Afghanistan and demanded Washington leave a base used by American drones after coalition aircraft allegedly killed 24 troops at two posts along a mountainous frontier that serves as a safe haven for militants.

The incident was a major blow to American efforts to rebuild an already tattered alliance vital to winding down the 10-year-old Afghan war. Islamabad called the bloodshed in one of its tribal areas a “grave infringement” of the country’s sovereignty, and it could make it even more difficult for the US to enlist Pakistan’s help in pushing Afghan insurgents to engage in peace talks.