Bombs in printer cartridges shipped from Yemen to Chicago were designed to explode in midair, according to the UK government.
The packages were discovered in a UPS plane at East Midlands Airport on October 29 and were addressed to Jewish synagogues in Chicago.
The packages contained printer cartridges filled with the explosives pentaerythritol tetranitrate and lead azide, along with an electrical circuit linked to a mobile telephone trigger mechanism. Both devices were described as “extremely professional” by intelligence officials.
Yemeni authorities have meanwhile asked FedEx and UPS to close their offices in Yemen, and today arrested a female medical student in connection with the incident.
The UK press reported that the devices were discovered newspaper reported that the devices were discovered after a tip-off by Saudi Arabian intelligence sources.