Egyptian police discovered two tons of explosives hidden near the border with Gaza, security sources said Tuesday.
The discovery was the second in the last three days in Rafah, a town which straddles the Egypt-Gaza border.
One source, who declined to be named, said police had found the entrances to four tunnels Monday and thwarted an attempt Sunday to smuggle 500 kg (1,100 lb) of explosives into Gaza.
"The Egyptian police received information about some smugglers storing these explosives in the area of Sarsuriyah near to the border between Egypt and Gaza," another source said. Some 400 tunnel entrances have been discovered by Egyptian police this year. They are usually blocked off or blown up.
It is not clear whether the Egyptian actions make the tunnels unusable.