Military-grade explosive

"The Interior Ministry identified the bomber in the most recent blast as 19-year-old Khalid Ayed Mohammed Wahabi Shammari. He disguised himself as a woman and blew himself up in the mosque parking lot after being prevented from getting inside." "The explosive used in that attack was RDX, a military-grade compound that was also deployed in the al-Qudeeh bombing." (thanks Amir)