The Trump administration has continued releasing people charged with being in the country illegally to nongovernmental shelters along the U.S.-Mexico border after telling those organizations that providing migrants with temporary housing and other aid may violate a law used to prosecute smugglers.

Border shelters, which have long provided lodging, meals and transportation to the nearest bus station or airport, were rattled by a letter from the Federal Emergency Management Agency that raised “significant concerns” about potentially illegal activity and demanded detailed information in a wide-ranging investigation. FEMA suggested shelters may have committed felony offenses against bringing people across the border illegally or transporting them within the United States.

“It was pretty scary. I’m not going to lie,” said Rebecca Solloa, executive director of Catholic Charities Diocese of Laredo.

U.S. Immigration and Customs Enforcement continued to ask shelters in Texas and Arizona to house people even after the March 11 letter, putting them in the awkward position of doing something that FEMA appeared to say might be illegal. Both agencies are part of the Department of Homeland Security.

After receiving the letter, Catholic Charities received eight to 10 people a day from ICE until financial losses forced it to close its shelter in the Texas border city on April 25, Solloa said.

The Holding Institute Community, also in Laredo, has been taking about 20 families a week from ICE’s family detention centers in Dilley and Karnes City, Texas, Executive Director Michael Smith said. They come from Russia, Turkey, Iran, Iraq, Papua New Guinea and China.

Annunciation House in El Paso, Texas, has been receiving five to 10 people day from ICE, including from Honduras and Venezuela, said Ruben Garcia, its executive director.

International Rescue Committee didn’t get a letter but continues receiving people from ICE in Phoenix, according to a person briefed on the matter who spoke on condition of anonymity to discuss information that has not been made public. The releases include people who had been held at ICE’s Krome Detention Center in Miami, the site of severe overcrowding.

ICE’s requests struck Solloa as a “little bit of a contradiction,” but Catholic Charities agreed. She said some guests had been in ICE detention centers two to four weeks after getting arrested in the nation’s interior and ordered released by an immigration judge while their challenges to deportations wound through the courts. Others had been flown from San Diego after crossing the border illegally.

Those released were from India, China, Pakistan, Turkey, and Central and South America, Solloa said.

Smith, a Methodist pastor, said that the FEMA letter was alarming and that agreeing to continue caring for people released by ICE was “probably not a good idea.” Still, it was an easy choice.