The probe into the parcel explosives aboard cargo planes originating from Yemen last week has turned up further similarities to other attempts made by al Qaeda in the past.

It was discovered that the use of syringes played a part in the recent terror attempt which further builds its similarities to the bombing attempt aboard an aircraft on Christmas Day.  Homeland Security Secretary Janet Napolitano said that the devices found contained all the hallmarks of a plot by al Qaeda in the Arabian Peninsula.

The explosives were discovered last week by authorities in the United Arab Emirates and Britain aboard cargo planes and destined for synagogues in Chicago, Illinois.  Both parcels originated in Yemen and caused the delay and searching of several cargo planes with packages from the same origination.

The devices were packed inside computer printer toner cartridges and were set to be detonated by a cell phone. The substance used for detonation was lead azide. It is a powerful, easily prepared substance that is often used in detonations.

Yemen investigators suspect Ibrahim Hasan al-Asiri to be behind the explosives. He is the top bomb maker for al Qaeda in the area. The explosives contained the chemical PETN which was also used in the foiled Christmas Day bombing attempt that has been linked to al-Asiri.

French Minister has said that the bomb was diffused a mere 17 minutes prior to its being detonated, but White House press secretary Robert Gibbs says he is unable to confirm that at this time.