The incident between the HMCS Regina frigate and two Chinese Su-30 fighters occurred on Monday, when the ship was in international waters off Shanghai, according to Matthew Fisher, an employee of the Canadian Global Affairs Institute.
The Regina captain told Fisher that the Chinese jets were not dangerous to his ship, but according to Fisher, her flight was more aggressive than anything the (Canadian Navy) had ever seen of Chinese fighter jets. CNN has asked the Canadian Department of Defense for further comments.
Chinese aircraft and ships had watched the Canadian warship and an associated supply ship shortly after it had completed a visit to Vietnam and traveled through the South China Sea in Taiwan The Straits and the East China Sea, Fisher reported.
Chinese Ministry of Defense spokesman Ren Guoqiang confirmed the presence of Canadian ships on Thursday.
"We were clear about the transit of Canadian ships through the Taiwan Strait and overseen the ships throughout the process," Ren said.
Before buzzing Monday, the next Chinese jets had flown several kilometers to the Regina Fisher
is Canada's only one of several allies and partners in the US, including France, Japan and the United Kingdom, which ships this year sent to the South China Sea or across the Taiwan Strait.
Beijing claims nearly the entire region of 1.3 million square miles of South China Sea as its territory and aggressively asserts its share, with President Xi Jinping saying he will never give up "every inch of territory."
The flyby of the Canadian warship occurred The arrest of Huawei's chief financial officer, Meng Wanzhou, in Canada in December 2018.
Shortly after Meng's arrest, two Canadians were arrested in China, former diplomat Michael Kovrig and businessman Michael Spavor.
Lily Lee and Ben Wescott of CNN contributed to this report.