Pakistan has said that its forces launched new strikes, destroying an important technical equipment storage tunnel in Kandahar, sources said.
The tunnel was reportedly being used to store sensitive and advanced technical equipment by militants, the security sources added.
In a separate strike, Pakistan's forces also destroyed an equipment facility near the Kandahar province.
Islamabad’s state-run television said that the storage facility was being used by “Afghan Taliban and terrorists against innocent Pakistani civilians”.
The military said that its operation would continue until the Taliban government addressed the neighbours' core security concerns.
Residents in Kandahar told AFP that they saw military aircraft flying over the city late at night and heard explosions. One resident said that flames were visible afterwards.
Sounds of an airstrike were also heard by locals in the border town of Spin Boldak, south-east of Kandahar .
Authorities in Afghanistan’s eastern border province of Khost also said that clashes were reported on Saturday night
The strikes came after Pakistani President Asif Ali Zardari condemned Afghanistan's drone attacks in three locations across Pakistan on Friday, warning Kabul that it had crossed a red line by attempting to target the country’s civilians.
The drones, both locally produced and rudimentary, were intercepted before they reached their targets.
The debris that fell wounded two children in Quetta and a civilian in Kohat and Rawalpindi, where the Pakistani military is headquartered.
The ongoing conflict between Pakistan and Afghanistan began just two days before the uS Israel war in Iran. In late February, Pakistan launched a military operation in Afghanistan after it accused the latter of harbouring the Pakistan Taliban.