A well-known Massachusetts immigration attorney says federal agents cornered him at Logan International Airport earlier this week and confiscated his phone without justification, according to a lawsuit he filed to retrieve the device.

Andrew Lattarulo, who represents thousands of clients in immigration proceedings, said he was approached by a group of Customs and Border Protection agents and one Homeland Security Investigations official after landing Sunday night on a flight from Aruba.

The agents did not present a warrant or a reason for detaining Lattarulo, but said they had stopped him for a “border search,” Lattarulo, of North Andover, wrote in a civil rights lawsuit filed Thursday in federal court in Boston.

Among Lattarulo’s clients are members of a Worcester family targeted by Im

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