Heavy casualties were feared on Tuesday after Afghanistan accused Pakistan of hitting a treatment center for drug addicts in the capital, Kabul, and killing civilians.

Pakistan denied deliberately targeting the facility, instead saying it had conducted precision strikes on ¡°military installations and terrorist support infrastructure.¡±

The Pakistani military has struck Kabul several times in recent weeks, as part of a conflict sparked by claims that the Taliban government has harbored extremists who have carried out attacks across the border.