The Israeli military says a boat carrying materials for making weapons was intercepted by the Israeli Navy last month en route to the Gaza Strip from the Sinai Peninsula.
The statement late Wednesday said the vessel carried material for intended for use by the Hamas military wing to build rockets and mortars.
The Shin Bet said that during the investigation the three detained men provided substantial information about smuggling between Sinai and Gaza and about Hamas’ use of fishermen and smugglers for its needs.
The investigation further revealed that the Hamas military wing smuggles consumer goods by sea as well, selling them at a profit to Gaza residents and using the money for its operations.
Hamas is increasingly smuggling by sea as Egyptian security forces are cracking down on the smuggling tunnels under the Egypt-Gaza border.