(KUNA) -- Egyptian security forces seized 600 kilograms of explosives in the north of Sinai, a security source said Friday. He was quoted by state-run news agency (Mena) as saying the T.N.T explosives were found following combing operations in many areas in the desert of Sinai.The explosives were found stuffed in bags near Ruthayyan village, said the source, and were disposed later. A ton of explosives had been found in the north of Sinai some time ago. The security authorities said last September they thwarted an attempt to smuggle weapons across the borders.