"The Islamic Emirate of Afghanistan condemns in the strongest possible terms the bombing and attack that took place from Pakistan on Afghan soil," government spokesman Zabihullah Mujahid told reporters in an audio message.
“We are implementing all options to prevent the recurrence (of such attacks) and demand that our sovereignty be respected.
The Pakistani side must know that if a war breaks out, it will not be in the interest of either party.
It will cause instability in the region,” he added.
Five children and a woman killed in the attack
Afghan Foreign Minister Amir Khan Muttaqi earlier summoned Pakistan's ambassador to Kabul to protest two attacks, which took place at dawn on the border between the two countries, one in Kunar, the another towards Khost.
"Five children and a woman were killed and a man injured by Pakistani rocket fire in Shelton district, Kunar," provincial information director Najibullah Hassan Abdaal told AFP.
Increasingly strained relationships
A resident of the district, Ehsanullah (he goes by a single name like many Afghans), confirmed the death toll, saying the attack was carried out by Pakistani military planes.
Since the Taliban seized power in Afghanistan last year, border tensions between the two countries have increased, with Pakistan claiming armed groups are carrying out attacks from Afghan soil, across a notoriously porous border.
Hundreds of civilians also demonstrated in Khost, chanting anti-Pakistani slogans, according to photographs obtained by AFP.
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