Washington (CNN) -- The use of syringes has surfaced in the Yemen parcel bombing probe, another detail pointing to similarities between that incident and the Christmas Day bombing attempt aboard a U.S. bound airliner.
A U.S. official told CNN Thursday that syringes were associated with the explosives found last week.
Homeland Security Secretary Janet Napolitano said the two devices found on the air freight planes have "all the hallmarks" of a plot by al Qaeda in the Arabian Peninsula, the Yemen-based arm of the terrorist network that claimed responsibility for the failed Christmas Day bombing attempt.
Authorities in the United Arab Emirates and Britain last week found two packages sent from Yemen with explosives that were destined for synagogues in Chicago, Illinois.
CNN
