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.