The US State Department said counterterror agencies were warned that the Nigerian man who allegedly tried to blow up an airliner Christmas Day may be under extremists' influence.
State Department spokesman Ian Kelly said it was up to the National Counterterrorism Center to coordinate the interagency effort that would have blocked 23-year-old Umar Farouk Abdulmutallab from entering the United States. He said US counterterror agencies received the information on November 20, a day after it was provided by the father, but it was not enough to revoke the visa.
Kelly said officials get thousands of negative messages about people that are not always accurate.
He said Abdulmutallab got the two-year tourist visa in 2008 because he had money, was attending a reputable school and had visited the United States before.