A pipe bomb exploded at a Marine Corps race in New Jersey

A pipe bomb exploded in a garbage can Saturday morning in a New Jersey beach town of Seaside Park, with the explosion timed to harm participants in a Marine Corps charity run.  Three pipe bomb devices were wired together and set to detonate with a timer, but only one detonated.  The timing of the explosion was set to coincide with the start of the race, but registration problems at the starting line caused the race to be delayed for a few minutes, resulting in nobody being near the bomb when it detonated.