The doctors, thought to have been trained by a man who worked with the top bomb-maker for al-Qaida in the Arabian Peninsula (AQAP), have the ability to put explosive compounds in breasts and abdomens of suicide bombers, the newspaper reported without citing its sources.

The lead doctor was thought to have been killed in a drone attack earlier this year and likely worked with the master bomber-maker, Ibrahim al-Asiri, according to the newspaper…

Experts said explosive compounds such as pentaerythritol tetranitrate (PETN) could be surgically implanted in an aspiring suicide bomber, who would them allow the wounds to heal, according to the newspaper. Body scanners in most airports around the world would not be able to detect the device, which could be detonated by injection, the newspaper added.