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This is the world in brief from the economist.

Our top stories.

Canada expelled a top Indian diplomat after Justin Trudeau, the Prime Minister,

said there were credible allegations that Indian government agents were involved in the killing of Hardeep Singh Najar,

a Sikh leader who was shot in British Columbia in June.

Mr. Trudeau told the House of Commons that he raised the issue, which he described as an unacceptable violation of Canadian sovereignty,

personally with Narendra Modi, the Prime Minister of India, at the recent G20 summit.

Mr. Najar, who was a Canadian citizen, supported the idea of a calistani state as a Sikh homeland,

and was labelled a terrorist by the Indian government.

Iran released five Americans in a prisoner's swap, mediated by Qatar.

In exchange for the hostages, all of whom are American-Iranian dual nationals,

the Biden administration agreed to unfreeze $6 billion of Iranian oil revenue,

which has been held in South Korea since sanctions were tightened in 2018.

America will also release five Iranians, two of whom are expected to return to their homeland.

America and Iran have recently been trying to de-escalate the tensions between them,

particularly over Iran's nuclear program.

Ukraine removed six deputy defense ministers amid efforts to reshape the defense ministry,

which has been dogged by allegations of corruption.

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