Alex Ritson

A majority of the deaths in Afghanistan were caused by a single strike in Kabul.

The UN has now confirmed that at least 269 people were killed when Pakistan struck a drug rehabilitation centre in Kabul on 16 March, the deadliest mass casualty incident in Afghanistan in recent decades.

Pakistan denies it hit civilians, saying it precisely targeted military installations and terrorist infrastructure.

I spoke to our correspondent in Kabul, Yogita Lemoye.

One of the reasons why this incident has shocked people so much is this is not a country that's a stranger to conflict and war.

It's endured four decades of it.

But in recent history, you've never seen a single strike with that kind of death toll.

And even the UN report released today is saying at least 269.

They're saying that the actual number could be significantly higher.

Afghanistan's Taliban government actually puts it at more than 400.

And the reason they say that it could be significantly higher is because there were many bodies that were charred beyond recognition.

The list of the patients who were admitted to this drug rehabilitation centre actually was burnt in the fire.

And so there are families who've not been able to find their loved ones at all or the remains of their loved ones.

And that is the reason why I think it sends shockwaves through this country.

And we have been speaking to the families of some of the victims.

We've come off the main roads of the city and we're going to meet the brothers of Mohammed Anwar Walizada.

He's one of the people who was killed in the bombing at the rehabilitation centre.

Mohammed was the elder brother of Mujtaba and Sadiq Walizada and we're just about to speak to them to understand what happened on the night that he was killed.

Sadiq received a call telling him that the Omid Rehabilitation Centre where Mohammed was admitted had been bombed.

The airstrike ripped through parts of the 2,000-bed Omid Rehabilitation Centre.