The Ontario government is now calling for new measures at the Canada-U.S. land border to prevent international travellers from skipping hotel quarantine.

Health Minister Christine Elliott and Solicitor General Sylvia Jones penned a letter to federal officials about the "deeply troubling" loophole at the land border, posing an extreme risk "in the face of deadly COVID-19 variants."

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"There are reports of international travelers booking return flights into nearby United States airports, taking a taxi or limousine to a United States-Canada land border crossing, and subsequently walking or driving across the border," wrote Eliott and Jones.

In the letter, they've requested a mandatory three-day hotel quarantine in "federally designated hotels at the highest traffic crossings" including Niagara, Windsor, Sarnia, and Brockville.

Premier Doug Ford also said during a press conference on Friday that he's begging Trudeau to tighten measures for international travellers, including "mandatory pre-departure testing for those flying into Ontario from other provinces."

Most importantly, though, he wants to "close the massive loopholes at our land border with the United States by bringing in a mandatory hotel quarantine for those major land crossings, because too many people are exploiting these weak measures at our land border to get around the hotel quarantine."