Egyptian authorities discovered two new tunnels leading under the border to the Gaza Strip and arrested several suspects, a security official said Monday. The first, 1,100 meter-long tunnel (1203 yards) was discovered in Salah el-Din north of the Rafah border crossing, said the security official on condition of anonymity because he was not authorized to give press statements. Inside, authorities found a weapons cache with bullets and explosives, five kilograms of heroine, and some medicine, the official said. Later Monday, a second tunnel was found south of Rafah border crossing at Al-Dohnia. Authorities arrested three Palestinians who were on their way from Gaza to Egypt, the official said.