KhostPakistan says it struck 10 Afghan sites Thursday.
Two former allies are trading strikes, and China, Turkey, Qatar and Saudi Arabia are mediating between them.
Information Minister Attaullah Tarar says drones crossed the border Wednesday and the strikes hit sites that store and launch them.
Khost officials reported no casualties, unlike Monday’s strikes, which Afghan officials say killed 3 civilians.
Taliban spokesman Zabiullah Mujahid promised an appropriate response to Monday’s strikes.
Sources: Al Jazeera Online, Bloomberg Business, RT