(IsraelNN.com) Security officials revealed Tuesday night that they have discovered hundreds of pounds of explosives in Judea and Samaria since September.

"In recent months the IDF, Israel Security Agency (Shin Bet), the Civil Administration, the [Gaza] Crossing Administration and the Israeli Police have been operating in order to uncover dangerous substances, based on ISA intelligence," military spokesmen stated.

Among the substances found were naphthalene and fertilizers that are used to manufacture weapons and explosives.

Israeli nationalists and many military officials have warned since the withdrawal of Israeli forces from Gaza three years ago that it was only a matter of time until terrorists would smuggle explosives and weapons into Judea and Samaria.

In September, security forces and soldiers uncovered more than 30 pounds and 20 gallons of materials in Kalkilya. The city is located adjacent to Kfar Saba, on the 1949 Armistice Line, and is several miles west of large communities in Samaria, including Emanuel, Kedumim, Karnei Shomron and Ginot Shomron.

Hazardous substances also were found in Ramallah, several miles north of Jerusalem and adjacent to the town of Beit El, and north of Jericho, east of Jerusalem. 

Earlier this year, the IDF prevented several suicide bombing attacks by nabbing terrorists at checkpoints, which the United States has been pressuring Israel to remove.