At least 27 students, most younger than 13, and a teacher were killed when a school roof collapsed during classes in Peshawar on Thursday.
Authorities warned that the death toll could rise as more children were feared buried in the rubble.
The incident occurred at the privately run Al-Khair Education Center school, where rescuers pulled bloodied students from the debris.
District emergency officer Iftikhar Khan said at least 45 children had been taken out, adding that some more were reported trapped under the rubble.
Government official Bilal Faizi said rescue teams were working to extricate bodies and shift the injured to hospital.