The Pakistani Army allegedly fired projectiles into Afghanistan on Thursday, even as delegations from both countries met in Turkey to resume peace negotiations aimed at stabilising their fragile ceasefire.
“Pakistan used light and heavy weapons and targeted civilian areas,” an Afghan military official told news agency AFP.
“We have not retaliated yet, out of respect for the ongoing negotiations,” the official added.
Afghan and Pakistani negotiators are resuming peace talks in Turkey on Thursday, aiming to prevent a return to hostilities following their worst clashes in years.
Relations between the neighbours have soured in recent years, with Islamabad accusing Kabul of harbouring militant groups that carry out attacks in Pakistan, claims that the Taliban authorities in Afghanistan deny.
Afghanistan has also claimed that Pakistan harbours and supports an offshoot of the terrorist group Islamic State (ISIS) who carry out attacks inside Afghanistan.
The latest conflict erupted after explosions in the Afghan capital on October 9 that the Taliban government blamed on Pakistan, prompting a retaliatory border offensive.
The ensuing fighting killed more than 70 people, including civilians, and wounded hundreds more.
The two countries, former allies who share a 2,600-kilometre (1,600-mile) frontier, agreed on October 19 to a ceasefire mediated by Turkey and Qatar, although its details have not been finalised.
A tense round of negotiations in Istanbul spanning several days ended last week with an agreement to extend the ceasefire and to meet again on Thursday.
Border clashes began early last month following explosions in Kabul which killed more than 70 people, including around 50 Afghan civilians, according to the United Nations. Pakistan claimed that the airstrike was conducted to eliminate a Tehreek-e-Taliban Pakistan (TTP) leader.
In response, the Taliban mounted a major counteroffensive across the border, killing more than 58 Pakistani soldiers and destroying 20 security outposts.
The two countries agreed to a ceasefire on October 19 in Qatar, but reached an impasse when trying to finalise details of the truce in Turkey last week.
Each accused the other of not acting in good faith in the process.
The negotiations were scheduled to resume in Istanbul on Thursday but neither side indicated immediately whether the delegations had met.
Both sides warned of renewed fighting if the talks fail.
