An Israeli official claims satellite images that raised suspicions Iran is trying to conceal a key nuclear test back Israel's concerns that Tehran is developing an atomic bomb.

The official said the pictures "reinforce what Israel has been saying all along ... the Iranian nuclear program is not benign." He spoke on condition of anonymity pending a formal government response.

On Wednesday, pictures provided by unspecified member countries to the International Atomic Energy Agency _ the U.N. nuclear agency _ appear to show trucks and earth-moving vehicles at Iran's Parchin military site. Diplomats said the images suggested the trucks could be carting away radioactive material created in nuclear testing.

Iran says its nuclear program is solely for peaceful purpose _ a claim Israel and the West reject.