A Canada Border Services Agency (CBSA) logo is seen on a worker during a tour of the Infield Terminal at Toronto Pearson International Airport in Mississauga, December 8, 2015. REUTERS/Mark Blinch
The spike comes immediately after Canada's federal government lifted its visa requirement for Mexican citizens in December.
Many Mexicans looking north have shifted their focus from the United States to Canada as President Donald Trump vows to crack down on America's undocumented immigrants, about half of whom are Mexican. On Friday, Reuters reported, immigration judges were reassigned to 12 U.S. cities to speed up deportation.
The Canada Border Services Agency (CBSA) said it detained 444 Mexican nationals between Jan. 1 and March 8, compared with 410 for all of 2016, 351 for 2015, and 399 for 2014.
The CBSA can detain foreign nationals if it is believed they pose a danger to the public, if their identity is unclear or if they are deemed unlikely to appear for removal or for a proceeding.
The number of Mexicans turned back at the airport has risen, too - to 313 in January, more than any January since 2012 and more than the annual totals for 2012, 2013 and 2014.
With the visa requirement lifted, all that Mexicans need to come to Canada is an Electronic Travel Authorization (eTA), obtainable online in a matter of minutes. But they cannot work without a work permit, and the eTA does not guarantee entry.
Canada issued 72,450 travel authorizations to Mexican citizens between Dec. 1, 2016, and March 10, 2017 - a significant increase compared with a similar period when visas were required.
Canada's Immigration and Refugee Minister Ahmed Hussen has said his department is monitoring the situation.
"It would be premature to draw conclusions or to speculate on future policy at this point," Hussen's spokeswoman, Camielle Edwards, wrote in an email Friday evening.Reuters