KABUL/ISLAMABAD, Sept 21 (Reuters) - Pakistani airstrikeskilled at least three people in Afghanistan on Monday, Afghan officials said, in action that could reignite tensions between the neighbours after nearly three months of relative calm.The Afghan side "will respond appropriately to this aggression," said Zabihullah Mujahid, chief spokesman of the government.Afghan officials said the strikes targeted civilians. The Afghan border provinces of Kunar and Paktika were reportedly struck. Key points and original sources are listed below.

• KABUL/ISLAMABAD, Sept 21 (Reuters) - Pakistani airstrikeskilled at least three people in Afghanistan on Monday, Afghan officials said, in action that could reignite tensions between the neighbours after nearly three months of relative calm.The Afghan side "wil...S1

• The Afghan border provinces of Kunar and Paktika were reportedly struck. Pakistan last carried out deadly strikes on Afghanistan in June.S2

• Three members of one family killed in air raid on house in Kunar province, Afghan Taliban deputy spokesperson says.S3