Canada said on Thursday that 13 of its citizens have been detained in China since Huawei Technologies Co Chief Financial Officer Meng Wanzhou was arrested last month in Vancouver at the request of the United States.

Canadian Foreign Minister Chrystia Freeland warns the United States not to politicise extradition cases, a day after President Trump said he could intervene in the case of a Chinese executive detained in Canada at Washington’s request.

China yesterday summoned the US ambassador to protest the "extremely bad" arrest of telecom giant Huawei's chief financial officer in Canada and demand that the United States drop its extradition request.

Canada defends its arrest of an executive of Chinese tech giant Huawei on a US extradition request after markets wobbled on fears of fresh friction between Washington and Beijing.