A senior Israeli official says Israel believes deeply buried stocks of enriched uranium at one Iranian nuclear facility hit by the U.S. military are potentially retrievable.

Related: A report by a British parliamentary intelligence committee warned that Iran was targeting dissidents and gathering intelligence on Jewish and Israeli targets in Britain. The Ukrainian authorities said yesterday that an elite officer from the S.B.U., its domestic intelligence agency, was gunned down in Kyiv in broad daylight.

Israel believes a U.S. strike buried the enriched uranium under an Iranian facility, the official told reporters in Washington.