The US and Iran still need to work out several sticking points before an agreement on the war can be reached, Vice-President JD Vance has said.
Asked by the BBC if President Donald Trump was close to signing a deal, Vance said it was too early to say "when or if" the two sides would finalise an agreement.
Meanwhile, waves of Israeli strikes have hit southern Lebanon, targeting Hezbollah infrastructure, according to the Israeli military.
The escalation threatens to derail talks aimed at ending the war between the US and Israel on one side and Iran on the other.
Iran insists that any deal must also cover Lebanon. Israel says it reserves the right to continue to fight the threat from Hezbollah.
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