Such an attack would be a betrayal towards the US President Donald Trump and could also risk triggering a broader regional conflict in the Middle East, according to the sources.
They emphasize that it is unclear whether Israeli leaders have made a final decision regarding the plans and simultaneously highlight that there are deeply divided opinions within the US government as to whether Israel will actually attack.
"The possibility of a Trump-negotiated agreement between the US and Iran that does not remove all the uranium that Iran has makes the chance of an attack more likely, says another source with insight to CNN.
Iran's supreme leader Ayatollah Ali Khamenei said on Tuesday that he doubts the ongoing nuclear energy talks with the US, which have been ongoing in several rounds since April 12.
The statement came after Trump recently expressed himself positively about the talks and said that a new nuclear energy agreement can be close.