Authorities detained a Palestinian man wearing a suicide belt after he entered Egypt through a tunnel on Gaza border intending to blow up Israelis vacationing in the Sinai region.
The arrest on the Egyptian side of Rafah on Tuesday led police to two Palestinian accomplices who had rented a flat in the town, they added.
"Under questioning he said that he intended to travel to south Sinai to carry out a suicide bombing at one of the villages or resorts frequented by large numbers of Israelis," one police source was quoted as saying.
Bombers have attacked south Sinai resorts three times in the past two and half years, but Israelis have continued to visit the Sinai resorts despite government warnings of possible attacks.
Egyptian police found 240 old anti-tank mines and six artillery shells stashed in a secret depot in the mountains of central Sinai on Wednesday, a police source said. Last week police found boxes loaded with around 18,000 bullets in a tunnel near the Egyptian border with the Palestinian territories and earlier in the month they found rocket-propelled grenades and hand grenades hidden in the sand on the same border.