A "pipe bomb" refers to an explosive device made from a pipe, usually filled with explosive material. It is designed to cause damage and harm when it detonates. Full definition
This would be an entirely different topic had the killers in these recent shootings used pipe bombs or some other device. (n4g.com)
The FBI took five people with possible links to the Chelsea explosion into custody last night in Brooklyn as authorities shut down a busy New Jersey rail station after finding multiple pipe bombs in a garbage can, police and New Jersey officials said. (nystateofpolitics.com)
The study examines a new method to optimize the recovery of DNA from detonated pipe bombs. (sciencedaily.com)