BEIJING — The Chinese authorities announced sweeping espionage accusations against two Canadians — a former diplomat and a businessman — on Monday, days after Canada approved an extradition hearing for an executive of a Chinese technology giant, whose arrest in Vancouver has incensed Beijing.

The spying accusations, made on an official news website for the Chinese legal administration, focused on the former diplomat, Michael Kovrig, while the businessman, Michael Spavor, was described as his “important source.” The allegations appear likely to deepen a political rift between Canada and China that was prompted by the technology executive’s arrest.

While the Chinese report did not announce formal criminal charges against Mr. Kovrig or Mr. Spavor, it could be read as a menacing signal in Canada, where Meng Wanzhou, the chief financial officer for Huawei, a big Chinese telecommunications company, faces possible extradition to the United States for trial on fraud charges.

[Huawei is said to be preparing to sue the American government over efforts to ban its products.]

The report came two days before the Supreme Court of British Columbia is set to begin a hearing on Ms. Meng’s possible extradition.