In immigration news: Border deaths, child migrants, Border Patrol flights, ethnicity and autism, more

A U.S. Border Patrol truck drives along the border fence in Texas. According to the agency, nearly 6,000 migrants have been found dead along the U.S.-Mexico border over the last 16 years. Authorities are investigating a a mass burial site found recently in South Texas that is believed to contain the remains of unidentified migrants. Scott Olson/Getty Images

Answers to Key Questions About Immigrant Burials - Associated Press Authorities and researchers are investigating the 52 graves recently found in a South Texas cemetery, believed to contain the remains of unidentified migrants who died crossing the U.S.-Mexico border several years ago. The remains were massed together, some in body bags and trash bags. According to the U.S. Border Patrol, nearly 6,000 migrants have been found dead along the border over the last 16 years.

Texas governor warns of 'trail of tears' from border crisis - Los Angeles Times Texas Gov. Rick Perry and other state officials are warning of more deaths along the U.S.-Mexico border if the federal government fails to dissuade the arrival of more families and unaccompanied minors from Central America. From the story: "Unlike earlier generations of immigrants who came prepared to cross harsh desert terrain, many today make the journey casually dressed, planning to turn themselves in for what they expect to be sanctuary. That attitude can prove fatal."

Jeh Johnson warns of dangers facing child immigrants - Politico In an op-ed piece published in Latino-market media outlets over the weekend, Homeland Security secretary Jeh Johnson wrote: "To the parents of these children I have one simple message: Sending your child to travel illegally into the United States is not the solution.”

Border Patrol Cancels Plan to Fly Immigrants to California - NBC 7 San Diego U.S. Border Patrol officials have reportedly scrapped a plan to fly detained immigrants from Texas to San Diego and El Centro. From the story: "The flights were in response to a surge of Central Americans entering Texas’ Rio Grande Valley, where Border Patrol has made more than 174,000 arrests since October 1."

Court strikes down Montana immigration law - USA Today From the story: "A Montana judge has ruled that enactment of the state's 2012 voter-approved law banning undocumented immigrants from accessing state services is pre-empted by federal law and is unenforceable. The law, which aims to deny government jobs and assistance to people in the U.S. illegally, required certain state agencies to certify through a federal database that those requesting services were United States citizens."

Autism Rates Higher Among Certain Immigrants, Minorities - Wall Street Journal A study of Los Angeles County birth records suggests particular risk among the children of mothers from some ethnic groups. From the story: "Children of foreign-born mothers who are black, Central or South American, Vietnamese or Filipino were more likely to be diagnosed with autism disorder than children of white U.S.-born mothers, according to the study, published online Monday in the journal Pediatrics."