Canada is immediately limiting carry-on items for flights to the United States in the aftermath of a failed terror attack on a Northwest Airlines flight.

"Effective immediately, U.S.-bound passengers are not allowed to bring carry-on bags into the cabin of the aircraft, with some exceptions," said a statement from Transport Canada.

According to the agency, carry-ons will be limited to medication or medical devices, small purses, cameras, coats, infant-care items, laptop computers, containers carrying life-sustaining or special-needs items, musical instruments, or diplomatic or consular bags. Crutches, canes and walkers also are permitted.

"These measures are expected to be in place at least for several days," Transport Canada said.

Canada made the change after a botched terrorism attack on a U.S.-bound plane.

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