By Herald staff/ Local briefs Monday, May 17, 2004
A beachcomber discovered a small box of explosives hidden in the sand behind a Revere Beach apartment complex yesterday and carried it to the local state police barracks, where the bomb squad detonated the package on the beach.
State police surmise the box full of commercial quality explosives washed up on shore some time before it was found about 5:30 p.m. The area around the Revere Beach barracks was closed for about an hour while police investigated. Link to Article
"explosives washed up on shore"
Or did a scuba diver deliver them?