US

Christie says his office is cooperating after receiving federal subpoena in bridge probe

  • New Jersey Gov. Chris Christie speaks during a ceremony to pass official hosting duties of next year's Super Bowl to representatives from Arizona, Saturday Feb. 1, 2014 in New York. Fellow Republicans are assessing the damage of new allegations that Gov. Christie knew about a traffic-blocking operation orchestrated by top aides. (AP Photo/Bebeto Matthews)

    New Jersey Gov. Chris Christie speaks during a ceremony to pass official hosting duties of next year's Super Bowl to representatives from Arizona, Saturday Feb. 1, 2014 in New York. Fellow Republicans are assessing the damage of new allegations that Gov. Christie knew about a traffic-blocking operation orchestrated by top aides. (AP Photo/Bebeto Matthews)  (The Associated Press)

  • New Jersey Gov. Chris Christie waits for the start of a ceremony to pass official hosting duties of next year's Super Bowl to representatives from Arizona, Saturday Feb. 1, 2014 in New York. Fellow Republicans are assessing the damage of new allegations that Gov. Christie knew about a traffic-blocking operation orchestrated by top aides.  (AP Photo/Bebeto Matthews)

    New Jersey Gov. Chris Christie waits for the start of a ceremony to pass official hosting duties of next year's Super Bowl to representatives from Arizona, Saturday Feb. 1, 2014 in New York. Fellow Republicans are assessing the damage of new allegations that Gov. Christie knew about a traffic-blocking operation orchestrated by top aides. (AP Photo/Bebeto Matthews)  (The Associated Press)

  • NFL Commissioner Roger Goodell, center, stands between Arizona Gov. Jan Brewer, left, and New Jersey Gov. Chris Christie, right, showoff souvenir football helmets after a ceremony to pass official hosting duties of next year's Super Bowl to Arizona, Saturday Feb. 1, 2014 in New York.   (AP Photo/Bebeto Matthews)

    NFL Commissioner Roger Goodell, center, stands between Arizona Gov. Jan Brewer, left, and New Jersey Gov. Chris Christie, right, showoff souvenir football helmets after a ceremony to pass official hosting duties of next year's Super Bowl to Arizona, Saturday Feb. 1, 2014 in New York. (AP Photo/Bebeto Matthews)  (The Associated Press)

Gov. Chris Christie says his office has received a subpoena from federal authorities investigating whether any laws were broken when lanes near a New Jersey bridge were apparently closed for political retribution.

Christie said Monday on a radio show that his office is cooperating with the U.S. Attorney's Office subpoena.

The Republican also says that he may have heard about traffic tie-ups in Fort Lee when they were going on last September, but that it didn't register with him as a major issue if he did.

He says a news report several days after the lanes were reopened got his attention and he asked staffers to look into it. The report indicated that the head of the Port Authority of New York and New Jersey did not authorize the closings.