A federal judge issued an emergency order blocking the possible deportation of a group of Guatemalan children who had crossed the border without their families, with a hearing scheduled for Sunday, after lawyers said the government appeared to be preparing removals that would violate laws affording protections for migrant kids.

Attorneys for 10 Guatemalan minors, ages 10 to 17, said in court papers filed late Saturday that there were reports that planes were set to take off within hours for the Central American country. But a federal judge in Washington said those children couldn’t be deported for at least 14 days unless she rules otherwise, with a virtual hearing set for Sunday afternoon.

Similar emergency requests were filed in other parts of the country as well. Attorneys in Arizona and Illinois asked federal judges there to block deportations of unaccompanied minors, underscoring how the fight over the government’s efforts has quickly spread.

Alarm bells raised among immigrant advocates

The episode has raised alarms among immigrant advocates, who say it may represent a violation of federal laws designed to protect children who arrive without their parents. While the deportations are on hold for now, the case underscores the high-stakes clash between the government’s immigration enforcement efforts and the legal safeguards that Congress created for some of the most vulnerable migrants.

At the border-area airport, the scene Sunday morning was unmistakably active. Buses carrying migrants pulled onto the tarmac as clusters of federal agents moved quickly between the vehicles and waiting aircraft. Police cars circled the perimeter, and officers and security guards pushed reporters back from the chain-link fences that line the field. On the runway, planes sat with engines idling, ground crews making final preparations as if departures could come at any moment — all as the courtroom battle played out hundreds of miles away in Washington.

Shaina Aber of Acacia Center for Justice, an immigrant legal defense group, said it was notified Saturday evening that an official list had been drafted with the names of Guatemalan children whom the U.S. administration would attempt to send back to their home country. vocates learned that the flights would leave from the Texas cities of Harlingen and El Paso, Aber said.

She said she’d heard that federal Immigration and Customs Enforcement officials “were still taking the children,” having not gotten any guidance about the court order.

The Department of Homeland Security, Immigration and Customs Enforcement and the Department of Health and Human Services did not immediately respond to requests for comment on Sunday.

Trump administration plans to remove nearly 700 Guatemalan children

The Trump administration is planning to remove nearly 700 Guatemalan children who came to the U.S. unaccompanied, according to a letter sent Friday by Sen. Ron Wyden of Oregon. The Guatemalan government has said it is ready to take them in.

It is another step in the Trump administration’s sweeping immigration enforcement efforts, which include plans to send a surge of officers to Chicago for an immigration crackdown, ramping up deportations and ending protections for people who have had permission to live and work in the United States.

Lawyers for the Guatemalan children said the U.S. government doesn’t have the authority to remove the youngsters and is depriving them of due process by preventing them from pursuing asylum claims or immigration relief. Many have active cases in immigration courts, according to the attorneys’ court filing in Washington.

Although the children are supposed to be in the care and custody of the Office of Refugee Resettlement, the government is “illegally transferring them to Immigration and Customs Enforcement custody to put them on flights to Guatemala, where they may face abuse, neglect, persecution, or torture,” argues the filing by attorneys with the Young Center for Immigrant Children’s Rights and the National Immigration Law Center.

An attorney with another advocacy group, the National Center for Youth Law, said the organization starting hearing a few weeks ago from legal service providers that Homeland Security Investigations agents were interviewing children — particularly from Guatemala — in Office of Refugee Resettlement facilities. HSI is ICE’s investigative arm.

The agents asked the children about their relatives in Guatemala, said the attorney, Becky Wolozin.

Then, on Friday, advocates across the country began getting word that their young clients’ immigration court hearings were being canceled, Wolozin said.

Migrant children traveling without their parents or guardians are handed over to the Office of Refugee Resettlement when they are encountered by officials along the U.S.-Mexico border. Once in the U.S., the children often live in government-supervised shelters or with foster care families until they can be released to a sponsor — usually a family member — living in the country.

The minors can request asylum, juvenile immigration status or visas for victims of sexual exploitation.

Due to their age and often traumatic experiences getting to the U.S., their treatment is one of the most sensitive issues in immigration. vocacy groups already have sued to ask courts to halt new Trump administration vetting procedures for unaccompanied children, saying the changes are keeping families separated longer and are inhumane.

Guatemala says it is willing to receive the unaccompanied minors

Guatemalan Foreign Affairs Minister Carlos Martínez said Friday that the government has told the U.S. it is willing to receive hundreds of Guatemalan minors who arrived in the U.S. unaccompanied and are being held in government facilities.

Guatemala is particularly concerned about minors who could pass age limits for the children’s facilities and be sent to adult detention centers, he said.

President Bernardo Arévalo has said that his government has a moral and legal obligation to advocate for the children. His comments came days after U.S. Homeland Security Secretary Kristi Noem visited Guatemala.