The New York Times reported in March that such a programme was among Riyadh's conditions for a normalisation deal with Israel. Saudi and U.S. officials have not confirmed that.

Pointing to precedents like Iraq and Libya, Israel has long worried that potentially hostile neighbours could use civilian nuclear energy and other projects developed under the 1970 Non-Proliferation Treaty (NPT) as cover for clandestine bomb-making.

"Naturally, Israel does not encourage such things. I don't think Israel should agree to such things," Energy Minister Israel Katz told Ynet TV when asked about a prospective Saudi civilian nuclear programme as part of possible bilateral ties.

Israel said last week it expected to be consulted by Washington on any U.S.-Saudi deal affecting its national security. Israel, which is outside the voluntary NPT and has no nuclear energy, is widely believed to have atomic weaponry.