FBI Joint Terrorism Task Force investigating explosives found in Manhattan

It looks to me like someone must have been walking, or running, down the street, carrying the C-4, and decided they had to throw them over the fence for some reason. Were they being pursued? If so, it was clearly not by law enforcement.

C4 explosives found in East Village NYC

Handout

Six to eight blocks of the plastic, military-grade explosive, formally known as Composition 4, were found in a black plastic garbage bag just inside Marble Cemetery, on E. Second St.

Several blocks of deadly C-4 explosive were found Monday morning in an East Village cemetery, police sources said.
There were no blasting caps found with the bricks, meaning there was no way to detonate the explosive.
"But it's still C-4, so it's being taken very seriously," a police source said.
Six to eight blocks of the plastic, military-grade explosive, formally known as Composition 4, were found in a black plastic garbage bag just inside Marble Cemetery, on E. Second St., between First and Second Aves.
The discovery was made at 10:50 a.m.
The NYPD Bomb Squad rushed to the scene, and police closed the area to traffic.