The southern part of Egypt's Sinai peninsula has been on high security alert since Wednesday after Israel warned its citizens of imminent terror attacks.

Hundreds of Israeli tourists started leaving the Sinai through the Taba border crossing after instructions from Israeli authorities not to travel to the popular vacation destination.

Colonel Wagdi Ramzy from the interior ministry official said on Friday that the authorities had provided photocopies of forged passports of the five suspected militants to all security checkpoints at the entrances to south Sinai resorts.

"The interior ministry received urgent news from inside and outside Egypt that there are some members of al-Qaeda planning to carry out attacks in Sharm el-Sheik and Dahab," said Ramzy, who oversees tourist security in the north of the Sinai peninsula.

The three resort towns of Sharm el-Sheik, Taba and Dahab have witnessed a string of deadly terrorist attacks that have claimed the lives of 125 people since October 2004.

The five alleged militants, whose nationality is not known, are believed to be carrying explosives, Ramzy said.

Police believe that the suspects are Egyptians, based on the photographs in the forged passports, said a police source who spoke on condition of anonymity because he was not authorised to give statements to the press.