The Department of Homeland Security on Wednesday told airlines about a potential new shoe-bomb threat and urged them to pay extra attention to overseas flights into the United States, NBC News reported.

Several officials said that “very recent intelligence” considered credible warns of possible attempts to attack passengers with explosives concealed in shoes.

Airlines will be paying more attention to passengers’ shoes on flights to the United States from other countries. Some passengers may also experience increased scrutiny in pat downs and full-body screenings.

In 2001, British national Richard Reid raised the alarm about shoe bombs after trying to donate explosives in his shoes while in-flight three months after the Sept. 11, 2001, terror attacks.

By Lee Shin-young, Intern reporter (sylee@heraldcorp.com)