U.S. Border Security

A U.S. judge ruled Monday that the Trump administration is operating within its authority when separating families stopped at the Mexico border, rejecting arguments that it was quietly returning to widespread practices that drew international condemnation.

Officials say they made nearly 41,000 arrests or detentions of people on the Mexico border last month. That's down 5% from the nearly 43,000 arrests in November and down 72% from a 13-year high of 145,000 in May.

A man convicted of shooting a U.S. Border Patrol agent nine years ago in a case that exposed a botched federal gun operation known as “Fast and Furious” was sentenced Wednesday to life in prison.

The mayor of the border city of Yuma, Arizona has withdrawn his city’s state of emergency that was declared in response to this year’s migrant crisis at the southern border -- saying that the crisis has diminished in recent months.

Maria is the only living relative to the 6-year-old girl she's raised as her own. After a gang killed all of their relatives, she brought the girl to the U.S. to ask for asylum. But the government took the girl from Maria, sending her to a shelter more than 2,000 miles away, because Maria isn't her biological mother.

Officials with U.S. Immigration and Customs Enforcement say they have found a drug tunnel along the U.S.-Mexico border in Nogales.

The driver who allegedly sped through an immigration checkpoint in southern Arizona and leading authorities on a 50-mile pursuit that reached 110 mph on Interstate 10 remains in federal custody.

The Mexican cartels are coming under increased pressure from U.S. lawmakers.

The U.S. Border Patrol says it busted another cross-border tunnel after arresting a group of four migrants.

Border Patrol agents and Mexican police discovered an incomplete cross-border tunnel running underneath streets in Nogales.

Tucson is joining Pima County as an impartial adviser in a lawsuit aimed at curbing construction of the border wall in three Arizona preserves.