Air cargo explosive type being analyzed: US' Napolitano
US Homeland Security Secretary Janet Napolitano said Saturday that the content of explosive packages found on board of US-bound planes still has to be analyzed to draw proper conclusions.
"All of that needs to be done by trained scientists and they are doing that right now," Napolitano told Fox News Channel.
She said the incident underscored the importance of vigilance and maintaining a high level of readiness throughout the US homeland security system.
"However, the security system has no one silver bullet," she noted. "You have to have multiple layers."
She praised Saudi Arabia for "good information sharing" and said the United States was cooperating with Britain and Gulf countries to learn more about the incident.
Police in the Gulf emirate of Dubai said on Saturday that a US-bound parcel bomb intercepted in Dubai was laced with the powerful PETN explosive and bore the hallmarks of the Al-Qaeda terror network.
The bomb was described by Dubai police as a complex and professional device made of PETN and lead azide, a highly explosive combination that can cause great damage.
It came in a cardboard box from Yemen which also contained English-language books and souvenirs.
The suspect parcel was one of two discovered on Friday in transit to the United States, the other being intercepted at Britain's East Midlands airport. Both were addressed to Chicago synagogues.
US President Barack Obama said the packages represented a "credible terrorist threat."
© 2010 AFP