Meanwhile Britain's BT carrier recently has chose to pull Huawei equipment from its existing network.
China has in the past detained Canadians when Ottawa cooperates with USA extradition requests, as it did in 2014 when a Chinese businessman, Su Bin, was arrested in Canada on United States espionage charges. "It serves as a reminder for people that China is a detention state", he said.
The NCISA warning also cites that their findings are consistent with other security agencies from around the world, and lead to "reasonable concerns" regarding the implementation of Huawei and ZTE technology in communication and information systems.
"Canadians will be expecting further retaliation if, in fact, they transport Ms. Meng to the United States and into the hands of USA authorities", Amanda DeBusk of the global trade law firm Dechert told CNBC.
Throughout the press conference Trudeau, who had championed improved trade relations with China, was repeatedly asked whether he plans to personally engage with the Chinese leadership to secure the release of detained Canadians.
The latest case doesn't seem to fit the pattern of the previous two, and Trudeau said he favors de-escalating the tensions. She is due in court on February 6.
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The comments upset Canada, which warned the United States against politicizing extradition cases.
The other two members of the partnership, the United Kingdom and Canada, are studying the security of Huawei equipment for upcoming 5G networks that will be run by carriers.
Roland Paris, a former foreign policy adviser to Trudeau, said the Trump administration should recognize the importance of countering Chinese efforts to pressure Canada over the extradition of an individual wanted by the U.S.
"At this point, Canada is trying to buy time by stressing it has a rules-based order and an independent judiciary", said the source, who declined to be identified because of the sensitivity of the situation.
The Canadian government is in contact with the pair and also seeking their release from the Chinese government.
Pressed by public broadcaster Radio-Canada why he had not personally intervened in the cases by calling China's President Xi Jinping, he said on Tuesday: "In global politics, it is always better to proceed by degrees".
The arrest of the Garratts came shortly after a Chinese businessman was picked up on a US warrant in Canada.