The case involves an Alberta woman who has been teaching in China for months.
The arrest of a Huawei exec has chilled China-Canada relations.
It’s unclear if the arrest of two Canadians in China is retaliation for the arrest of Huawei’s CFO Meng Wanzhou in Vancouver.
U.S. official said investigators were concerned about the breach because Marriott is frequently used by the military and government agencies.
The US wants Meng Wanzhou to face allegations of fraud related to the use of Huawei’s subsidiary Skycom to do business with Iranian telecom firms between 2009 and 2014.
News of Michael Kovrig’s detention comes after China warned Canada of consequences for its recent arrest of Huawei CFO Meng Wanzhou at Vancouver’s airport.
EU has threatened to impose retaliatory tariffs on US orange juice, peanut butter and other goods in return.