Canadian authorities have arrested Huawei’s chief financial officer at the request of US law enforcement.
Meng Wanzhou, who is also deputy chair of the Chinese telecoms giant, was arrested in Vancouver on 1 December, Canada’s Department of Justice said.
Ms Meng, daughter of Huawei’s founder, was being sought for extradition by the US, the department added.
Huawei said it had little information about the charges and was “not aware of any wrongdoing by Ms Meng”.
Ms Meng was detained while transferring between flights, the firm said.
She will face a bail hearing on Friday, a spokesman for Canada’s Department of Justice said.
He declined to say more about the case, citing a publication ban requested by Ms Meng and ordered by the courts.
US media have reported that Huawei is under investigation for potential violations of US sanctions against Iran.
US lawmakers have also repeatedly accused the company of being a threat to US national security, arguing that its technology could be used for spying by the Chinese government.
In a statement, Huawei said it complied with “all applicable laws and regulations where it operates, including applicable export control and sanction laws and regulations of the UN, US and EU.
“The company believes the Canadian and US legal systems will ultimately reach a just conclusion.”
A spokesman for the US Justice Department in the Eastern District of New York – which Huawei said had brought the charges – declined to comment.
The arrest comes as the US has brought a number of legal cases against Chinese technology firms, with accusations such as cyber-security theft and violations of US sanctions against Iran.
Earlier this year, it barred US companies from exporting to Chinese telecommunications firm ZTE over violations of the Iranian sanctions, effectively shutting down the firm.
The US later replaced the ban with a fine and governance changes.