Afghanistan has confirmed that more than 400 people were killed and over 250 injured in a Pakistani airstrike targeting a Kabul hospital that treats drug addicts.
The alleged attack came hours after Afghan officials said the two sides exchanged fire along their common border, killing four people in Afghanistan.
Afghanistan's deputy government spokesman Hamdullah Fitrat said the death toll from the airstrike had increased to 400, with another 250 reported injured.
Rescue teams are trying to control the fire at the building and recover the bodies of the victims.
Pakistan had earlier denied hitting a hospital, saying its strike in Kabul had not hit any civilian sites.
