In a message posted on the social network X, Bennett said that more than 269 civilians had been killed in Pakistan's air strike on the addiction rehabilitation hospital in Kabul on 15 March.
Warning of the legal consequences of the action, the UN Special Rapporteur stressed that " deliberate attacks on civilians or civ objects may amount to war crimes." He also called on the Taliban to ensure the safety of patients at such centres.
On the evening of 15 March, Pakistani fighter jets, as part of an operation known as "Ghazab-Lil -Haq", bombed the drug treatment centre in eastern Kabul. Since 2016, the centre had operated as one of the largest addiction-treatment facilities, with a capacity of close to two thousand patients.
While the United Nations has confirmed the deaths of 269 civilians and the wounding of a further 122 in the incident, Taliban officials have put the death toll at more than 400.
At the same time, Human Rights Watch and Amnesty International have described the attack as unlawful, disproportionate, and possibly a war crime, and have called for an independent investigation and accountability from Islamabad.
The Taliban have described the bombing as a deliberate massacre of patients and civilians and a flagrant violation of international humanitarian law, insisting that the Omid centre was purely a medical facility with no connection to any military sites.
Pakistan, by contrast, has rejected these claims, stating that the operation targeted military facilities, an ammunition depot, and terrorist infrastructure linked to Tehreek-e-Taliban Pakistan, and that the medical centre was not directly targeted. Islamabad claims that secondary explosions from ammunition stored at the site caused the destruction of, and damage to, adjacent buildings.