Ganesh Marin, a Ph.D. biologist at the University of Arizona, studies animal movement along the Arizona-Mexico border. He reports a rich diversity ... to navigate the mountain range and avoid the ...

Mexican authorities suspect the underground pathway was a “narco tunnel” intended for smuggling drugs or people beneath the ...

Arizona border sheriff Mark Dannels said he expects migrants to keep trying to cross the U.S.-Mexico border despite immigration reform in 2025.

Authorities seized some unusual weapons that were headed across the Arizona-Mexico border last month. U.S. Customs and Border Protection agents at the Nogales Port of Entry seized a rocket ...

In 2013 the ACLU of Arizona and ACLU of San Diego launched the ACLU’s Border Litigation Project to investigate, document and litigate civil and human rights cases in the U.S.-Mexico border region, ...

Two weeks ahead of President-elect Donald Trump’s second inauguration, Mexico continues dissolving attention-grabbing migrant ...

Illegal immigration at the U.S.-Mexico border dropped to a five-year low this week, amid the holidays and the Biden administration's ongoing efforts to contain unlawful crossings at the border.

Cold nighttime temperatures are expected to continue through the weekend, and northern Sonora towns could see more snow.

WASHINGTON, Jan 7 (Reuters) - The number of migrants arrested illegally crossing the U.S.-Mexico border in December was lower than when President-elect Donald Trump ended his first term in 2020 ...