DALLAS — The American Civil Liberties Union sent a letter to Greyhound last week asking the company to deny immigration agents from boarding its buses unless they have a judicial warrant for a specific passenger, reported the San Francisco Chronicle.

The letter was prompted by several incidents in which U.S. Border Patrol agents have boarded Greyhound buses and questioned passengers in their attempts to crack down on illegal immigration, the report said.

In response to the ACLU’s letter, Greyhound said in a statement that it understood the concerns of the ACLU and bus passengers but said it “is required to comply with the law.” The company cited federal laws allowing immigration officers within 100 miles of the border to enter and search any vehicle “to prevent the illegal entry of aliens into the United States,” and to detain individuals, without a warrant, based on a “reasonable suspicion” that they were illegally in the country, according to The Chronicle.

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