Iran’s top diplo­mat said Tues­day that the ten­ta­tive deal to end the war with the Unit­ed States would re­quire Is­rael to with­draw from Lebanon — a con­di­tion Is­rael has al­ready re­ject­ed and that could sink the agree­ment, lead­ing to the re­sump­tion of all-out war.

The deal, which is be­tween the U.S. and Iran, has not been made pub­lic, and of­fi­cials have some­times of­fered con­tra­dic­to­ry in­ter­pre­ta­tions of what is in it. While Is­rael is not par­ty to the agree­ment, it is part of the war: It joined the U.S. in launch­ing strikes on Iran on Feb. 28, and has since fought the Iran-backed Hezbol­lah mil­i­tant group in Lebanon and seized large swaths of that coun­try.

Iran­ian For­eign Min­is­ter Ab­bas Araghchi said Is­rael’s con­tin­ued oc­cu­pa­tion of south­ern Lebanon would vi­o­late the deal.