Federal authorities were at the Texas home of Democratic Rep. Henry Cuellar Wednesday as part of an undisclosed law enforcement investigation.
In a brief statement, the FBI confirmed that agents were "present in the vicinity" of Cuellar's Laredo, Texas residence conducting a "court-authorized law enforcement activity."
"The FBI cannot provide further comment on an ongoing investigation," the bureau said.
Late Wednesday, Cuellar's office promised to assist federal authorities.
"Congressman Cuellar will fully cooperate in any investigation," the lawmaker's office said in a statement, which did not elaborate on the nature of the inquiry. "He is committed to ensuring that justice and the law are upheld."
Earlier this year Cuellar, whose district includes a swath of the Texas border with Mexico, joined with Sen. Lindsey Graham, R-S.C., in a call for the Biden administration to appoint a “border czar” to deal with the influx of migrants.
Cuellar said in July that the administration needed to pay attention to local border communities and border patrol officials working in the region.
"They don't need pats on the back. They need help down there on the border," Cuellar said then. "Something has to change when it comes to border immigration issues."
This article originally appeared on USA TODAY: Federal authorities at home of Texas Rep. Henry Cuellar