The app -- dubbed Alert Button -- will allow nationals who think they are about to be detained to notify the “consulate closest to their location," officials said.

Mexico is developing a cellphone app that will allow migrants to warn relatives and local consulates if they think they are about to be detained by the U.S. immigration department, a senior official said Friday.

Mexican security forces have detained about 475,000 irregular migrants since October, authorities said on Friday, as U.S. President-elect Donald Trump threatens Mexico with tariffs unless it stops illegal migrants from arriving at the shared border.

Mexico will launch a mobile application with an alert button for migrants facing imminent detention in the United States, the government said Friday, following President-elect Donald Trump's threats of mass deportations.