Mexico is launching a smartphone app that allows Mexican migrants to warn relatives and instantly alert the nearest consulate if U.S. immigration agents detain them, officials said Friday.

Why it matters: The announcement came as part of a broad warning from the administration of Mexico’s President Claudia Sheinbaum that the nation will defend the human rights of Mexican citizens in the U.S. amid President-elect Trump’s mass deportation plans.

Zoom in: Mexico Foreign Secretary Juan Ramón de la Fuente said at a press conference that the “emergency notification” app will go live in January.

• “I have personally attended several open meetings where the key message is to tell our fellow citizens that they are not alone and will not be alone,” De la Fuente said.

Zoom out: De la Fuente said Mexico’s “Know Your Rights” program will be part of a rapid response to possible enforcement scenarios or “other intimidating actions.”

• Mexico’s legal protection program includes 329 legal advisors at all 53 consulates in the U.S., along with voluntary support from consultants and law firms across the country, he said.

State of play: Trump has said his mass deportation plan will likely include U.S. citizens who are the children of undocumented immigrants and the erection of new detention camps around the country.