Oliver Conway

in Washington.

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Hosted by India, it's billed as the first AI summit of the global south.

Addressing the gathering, the UN Secretary General, Antonio Guterres, said all of humanity should be allowed to enjoy the benefits of artificial intelligence.

But the official opening of the summit has been overshadowed by the withdrawal of Microsoft founder Bill Gates.

He cancelled his keynote address after growing scrutiny over his ties to the late sex offender Jeffrey Epstein.

I heard more about his absence from our technology editor Zoe Kleinman, who's at the summit in Delhi.

It's been a big surprise because there were rumours that he was going to pull out, which were then denied.

And I know he's here in India.

He's in the country and he's been visiting tech hubs this week.

So for it to be announced by the Gates Foundation, really with a couple of hours notice is quite extraordinary.

Now, they haven't said anything.

that it has anything to do with his association with Jeffrey Epstein.

But reading between the lines and standing here in a massive press room with the assorted media, it's quite clear that that's what everybody really wants to talk to him about.

And the reason that was actually given was that he didn't want to distract from the summit.

And I think quite possibly it would have been a distraction, but pulling out has also caused a big distraction.

And what does this mean for the summit as a whole?

Because it's already been criticised over how it's been managed.

And there was another cancellation from the boss of NVIDIA.