Saudi officials believe that the prince's assailant exploded the 100-gram device using a detonator with a chemical fuse, which would also not be detected by a metal detector.
CNN: Analysis: Similar explosive on plane used in Saudi attack
2.
"The device contained two blue barrels with 125kg of homemade explosives in each one, and a detonator -- all the equipment which meant this device was ready to go, " he said.