@pbsnews: U.N. officials in Afghanistan said Pakistani forces conducted overnight strikes that killed at least 28 people, including women and children. Villagers on Monday sifted through buildings that were reduced to rubble, and an Afghan official promised that the country would retaliate. A top Pakistani official said dozens of militants were targeted and killed in the strikes. This latest escalation follows months of cross-border fighting that's killed hundreds. Multiple rounds of talks have so far failed to produce a cease-fire. #pbsnewshour #newshour #pbsnews #news #afghanistan #pakistan #worldnews