More than 100 people have been killed in a Pakistani air strike on a drug treatment centre in Afghanistan's capital, forensic laboratory sources told the BBC. Some of the bodies were injured beyond recognition, sources at the Kabul Forensic Medicine department said. Taliban officials have put casualty figures much higher, with claims reaching at least 400 deaths. The UN has demanded a swift investigation into the strike that targeted the Omid Addiction Treatment Hospital.

Pakistan has denied responsibility for intentionally striking the facility, stating it aimed precisely at military installations and terrorist support structures. The tensions have escalated as Pakistan accused Afghanistan of harboring militants responsible for attacks on its territory.

The strike took place during a time when around 2,000 individuals were being treated at the rehabilitation centre, leading officials to believe there could be hundreds of casualties. Despite Pakistan's claims of carefully conducted strikes to avoid civilian harm, eyewitness accounts and Taliban officials underline the tragedy's scale.

Rescue operations were ongoing into Tuesday, with families desperately seeking information about their loved ones amidst reports of more than 30 bodies being carried away from the scene. The International community, including the UN, is calling for de-escalation amidst the worsening conflict between the two nations.