China has accused two Canadian nationals of spying and stealing national secrets.
The men were detained in December following the arrest of Huawei's top executive in Canada for breaching US sanctions on Iran.
The Canadian justice department has now approved the beginning of extradition proceedings for Meng Wanzhou, who is suing the country for "serious breaches" of her civil rights.
North America correspondent William Denselow reports:
US military says it turned away blockade runner trying to reach Iranian port
The US military has announced that it fired a missile into the engine room of a vessel trying to get through the US blockade of Iran on Friday.
WHO chief urges safe burials in visit to heart of Ebola outbreak
The World Health Organisation (WHO) chief has travelled on Saturday to the Congolese province hardest hit by an Ebola outbreak, urging residents to seek treatment and practice safe burials as officials scramble to contain the fatal disease.
Rescuers pull four from flooded cave in Laos
Rescuers pulled four people from a flooded cave in Laos on Saturday, Thai volunteers said, hours after another man was brought out late on Friday.
Brazil investigates suspected Ebola case in Sao Paulo
Health authorities in Brazil's Sao Paulo state are investigating a suspected case of Ebola reported on Saturday in the state capital, officials said.
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