The US and the UK have sided with Canada in its investigations into the killing of Canadian Sikh separatist leader Hardeep Singh Nijjar last year, which identified top Indian diplomats including the former high commissioner (who was subsequently recalled by India) as ‘persons of interest’, and said they expected India to cooperate.

The US Justice department has charged Vikash Yadav, a former Indian intelligence officer, in the alleged plot.

Last week, US federal prosecutors charged an Indian government official with orchestrating a plot to murder a Sikh activist in New York City. India has designated that activist, Gurpatwant Singh Pannun,

India’s high commissioner to Canada has denied any involvement in the murder of a Canadian Sikh leader who was killed in British Columbia last year even though the Canadian government has named him as

The UK says Delhi's co-operation is the "right next step" after Canada accused Indian agents of criminal activity in the country, which India denies.

Canada‘s foreign minister, Mélanie Joly, says India was asked to waive diplomatic and consular immunity and cooperate in the investigation but it refused