CAIRO, Egypt - Authorities said Tuesday they arrested an Egyptian engineer from the country's nuclear energy agency for spying for Israel.

Prosecutor-General Abdul-Maguid Mahmoud announced that two foreigners, one Japanese and one Irish, also were arrested in the case.

Mahmoud identified the Egyptian engineer as Mohammed Gaber and said he was arrested Feb. 18 but that news of his detention were withheld pending the completion of the investigation. He said Gaber stole "important documents" from the Atomic Energy Agency and passed it on to agents of Israel's Mossad intelligence service.

Egypt has a small research atomic reactor but has recently announced plans to develop a nuclear energy program.