Palestine Press Agency reports(Arabic):
An Egyptian security source says that 500 kilograms of explosives and 40 mines had been uncovered during the last two days near the border with the Gaza Strip.
As quoted by the French news agency, the Egyptian source said that the explosive materials and mines found in two locations near the border with the Gaza Strip were intended for smuggling into the (Gaza) sector."
I have not seen this yet at AFP or any other news source yet, but PalPress has been pretty reliable over the past on topics like these.
