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(CBS NEWS) -- A man was arrested Tuesday for attempting to drive through a security checkpoint at the White House, according to the U.S. Secret Service.

The man, the Secret Service said, was attempting to follow a motorcade carrying the Obamas' daughters, Sasha and Malia. He was stopped by Secret Service officers after the security checkpoint to the White House at 17th St. and Pennsylvania Ave., N.W., and is still in custody.

The man, whose name has not been released, was in possession of a pass that allows him to enter the Treasury Department, which is next door to the White House.

The Secret Service told CBS News Chief White House Correspondent Major Garrett that the driver cooperated during his arrest and had nothing on his person that was suspicious and his vehicle was clean. The Secret Service is trying to figure out why a Treasury Department pass holder would be confused about protocol on Pennsylvania Ave., which has been closed to traffic in front of the White House since 1995.

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