A third Canadian has been detained in China, according to Global Affairs Canada.
Canadian officials refused to provide any details about who the individual is or why they are retained, with reference to integrity.
"Global Affairs Canada is aware of a Canadian citizen detained in China. Consular officials provide help to the family," said spokesman Maegan Graveline
A source who spoke on terms of anonymity said that Canadian officials found out detention on Tuesday by someone who knows the last detainee – not by Chinese officials.
Chinese Foreign Ministry spokesman Hua Chunying told a media briefing on Wednesday that she had not heard of the third detention.
The latest arrest, first reported by the National Post, comes from growing tensions between Canada and China.
Canada has met hard criticism from Chinese officials and media because Meng Wanzhou, a leader in China-based telecom giant Huawei, was arrested in Vancouver earlier this month. Meng was arrested at the request of US officials and released on the bail pending extradition proceedings.
Not long after Meng's arrest, Chinese officials confirmed that two Canadian men were imprisoned for national security problems, officials in China said.
One of the Canadians Michael Kovrig served as a diplomat with GAC but was on leave to work with a non-governmental organization at the time of his arrest in China. The other man, Michael Spavor, is a businessman who arranges tours in North Korea.
Canadian officials do not connect the latest arrest to the latest diplomatic turbulence between the countries.