One of the two bombs posted from Yemen last week was transported on two passenger planes before being seized in Dubai, Qatar Airways has said. The device was carried on an Airbus A320 from Sanaa to Doha. It was then flown on another aircraft to Dubai. It contained the powerful explosive PETN, which is difficult to detect. Yemen has, meanwhile, granted conditional release to a woman who was arrested on suspicion of mailing the devices, her family and officials said. Human rights groups named her as Hanan al-Samawi, a 22-year-old student. Officials said that while Ms Samawi was being questioned, a shipping agent said she was not the individual who posted the packages, which were addressed to synagogues in the US city of Chicago. Investigators had concluded her identity was stolen by an individual who knew her full name, address and telephone number, they added.