At 12.10 p.m. there was a loud explosion in the chemistry laboratory and first-floor corridor of Block 1 on the campus, where the hooded persons were preparing their explosive devices.
7. 夜间12时10分，校园里的化学实验室和1号楼一层走廊发生剧烈爆炸，蒙面人当时正在那里准备爆炸物。