Pakistan says it killed 28 militants, Taliban reports three civilian deaths

KABUL/ISLAMABAD, Sept 21 (Reuters) - Pakistan's government said on Monday that airstrikes killed at least 28 militants in the Afghanistan-Pakistan border region, with one security official saying two Afghan provinces were targeted. Hours earlier, Afghan Taliban officials accused Islamabad of killing at least three civilians in overnight airstrikes on its territory. The attacksbroke nearly three months of relative calm. Zabihullah Mujahid, chief spokesperson of the Taliban-run Afghan government, said the Afghan side "will respond appropriately to this aggression."