More Mexicans have been detained at the Canadian border in the first 67 days of 2017 than at any other point over the past three years, Reuters reported Friday.

The Canada Border Services Agency detained 444 Mexican national Canada between Jan. 1 and March 8, according to Reuters. That's more than the annual totals for 2016, 2015 and 2014.

The spike in immigrant detentions comes after Canada revoked its policy requiring Mexican nationals to get visas before entering the country. Instead, they must obtain an Electronic Travel Authorization, which can be secured relatively easily online.

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Canada has provided 72,450 eTAs between Dec. 1, 2016 and March 10, 2017, according to Reuters. A record 313 Mexicans were turned away at the airport.

Foreign nationals are typically detained if they cannot identify themselves, if authorities believe they pose a threat to public safety or if they are not considered likely to appear at a hearing. Those who are put in detention must be allowed to go before a judge within 24 hours.

Trump has vowed to ramp up U.S. border security and deport undocumented immigrants, particularly those charged with crimes. He has also promised to build a massive wall along the U.S.-Mexico border.