Two airline passengers entering Canada from the United States were fined nearly $16,000 each for submitting fake vaccination cards and Covid-19 test results, officials said.

The passengers also failed to stay at government-authorized accommodations, as is also required by the country’s government, Canada’s public health agency said Friday.

The two Canadian citizens, who were not identified in a news release, travelled to Toronto two weeks ago from United states, Health Canada spokeswoman Maryse Durette told news media.

They mark the first case of travellers using fake vaccination documents to enter the country, Durette said.

They were fined nearly $20,000 Canadian dollars, or about $16,000 in U.S. dollars. Durette declined to release other information about them.

In March, the U.S. Federal Bureau of Investigation warned of fake vaccine cards circulating on social media sites as instructions on how to produce them appeared on forums frequented by anti-vaxxers and supporters of former President Donald Trump.