The U.S. Attorney in New Jersey on Thursday subpoenaed New Jersey Gov. Chris Christie’s (R) reelection campaign for documents related to lane closures on the George Washington Bridge.

A subpoena was also issued to the state’s Republican Party.

“The campaign and the state party intend to cooperate with the U.S. Attorney’s office and the state legislative committee and will respond to the subpoenas accordingly,” attorney Mark Sheridan said in a statement Thursday.

Christie’s reelection campaign has hired Patton Boggs, a top Washington, D.C., law firm, to help them respond to the George Washington Bridge probes that have been launched by the state legislature and the U.S. attorney. The law firm will also be representing the New Jersey Republican State Committee.

The legislative committee last week sent a total of 20 subpoenas requesting documents, many to top Christie staffers and one to the governor’s office and his campaign apparatus.

Robert Luskin and Sheridan will head up the Patton Boggs legal team. Sheridan said the two would also be representing Nicole Davidman, the wife of Christie’s spokesperson Michael Drewniak, who also received a subpoena from the legislative committee.

The probes came after emails revealed a member of the Christie administration was involved in the closure of lanes of the George Washington Bridge last year in apparent retaliation against a mayor who failed to endorse the governor’s reelection bid.

The subpoenaed documents and records regarding the bridge closure from the legislature are due back to the legislative committee Feb. 3.

Luskin specializes in complex criminal and civil litigation and has special experience in official corruption cases, according to the company’s website.

Sheridan, who is based in New Jersey, had been a member of Christie’s transition team. He currently also acts as council to the New Jersey Republican State Committee and deals with campaign finance and campaign litigation in the state.

Last week, the governor’s office also brought on an outside law firm to launch its own internal review of the bridge closure and to respond to an inquiry from the U.S. attorney.

This story was first posted at 1:24 p.m. and has been updated with new information.