Suicide Bomb Instructor Kills 21 Students By Accidentally Detonating

Iraqi officials arrested 22 men after insurgents accidentally set off a car bomb in a Sunni area just north of Baghdad, killing 21 people.

Iraqi authorities said that these insurgents were attending a lesson on how to assemble car bombs and explosive belts when a glitch set off the car bomb and not only killed the instructor, but 21 of the militants attending the lesson.

According to businessinsider.com:

Authorities found seven car bombs — all without plates — several explosive belts and roadside bombs after searching two houses and a garage in the dense area, offering a rare glimpse into the workings of militants behind a resurgence in violence in the country. Bomb experts began working immediately to defuse the explosives.

Security forces rushed to the area after hearing the explosion and arrested 22 men trying to flee the area, including several who had been wounded.