The official blames Egypt, saying it is not doing enough to stem smuggling through a network of tunnels along the relatively short border between its Sinai desert and the Gaza Strip. The official said most of the tunnels were concentrated in an area no longer than 2.5 miles (4 kilometers).
'Egypt can stop all this smuggling of weapons within 24 hours if they want to do it,' the official said Sunday, speaking on condition of anonymity under Israeli security regulations.
The official said, however, that intelligence cooperation with Egypt was otherwise effective." (source)