Afghan troops opened fire on Pakistani border posts late Saturday.

Pakistan responded with gun and artillery fire. Pakistani armed forces destroyed 19 Afghan border posts in retaliatory attacks.

Pakistan’s two main border crossings with Afghanistan, at Torkham and Chaman, were closed on Sunday, local officials said. At least three minor crossings, at Kharlachi, Angoor Adda and Ghulam Khan, were also closed, local officials said.

Landlocked Afghanistan has a 2,600-km (1,600-mile) -long border with Pakistan. Islamabad accuses the Taliban administration of harbouring militants who attack Pakistan.