The Taliban government has confirmed launching "retaliatory operations" against Pakistani troops in multiple mountainous locations on the northern border.
Casualties are not yet clear, but the attacks were in response to alleged violations of Afghan airspace by Pakistan and the bombing of a market inside the border on Thursday.
Pakistan's Interior Minister Mohsin Naqvi said the Afghan attacks were "unprovoked" and civilians were fired at, warning that his country's forces would respond "with a stone for every brick".
Both sides are said to have used small arms and artillery in the Kunar-Kurram region.
Author's summary: Taliban confirms retaliatory attacks on Pakistan.