More than half a million people are expected to attend the event in the heart of the French capital.

Asked about the Iranian proposal, a US official told the BBC "constructive discussions" were taking place through mediators.

Four Americans and a Greek national are among those killed in a suspected gas explosion, officials said.

An emergency has been declared across the capital of Thailand as days of heavy rain leave the city inundated.

Roelf Meyer tells the BBC that being a white Afrikaner gives him legitimacy to challenge Trump's claim of a genocide.

OpenAI said its bots accessed public data from a range of institutions during test exercises.