improvised explosive device

It is not clear whether that means the pipe bombs were unrelated to the next day’s riot or were part of the riot planning.
The roadside bomb hit a tourist bus carrying 25 people mostly from South Africa, officials said Sunday.
The military says three other service members and one American contractor were wounded during the explosion in Ghazni.
25 Johns Hopkins surgeons and staff worked for 14 hours to transplant a penis and scrotum to an Afghanistan war veteran maimed by an I.E.D.