
The explosives were dug up in May or June 2009 by a groundskeeper and laid away, Police Commissioner Ray Kelly told reporters. A volunteer cleaning within the cemetery found the bag.
The explosives were not set up or wired to set off.
Each stick is about one and a quarter pounds, said Kelly, who recognized the powerful explosive as C-4.
"Inside a building, clearly it could have caused an awful lot of damage," he said.
Kelly added the material would be taken to a police sacking range by members of a bomb squad.
