Questions have been raised over whether both parties are serious about achieving a ceasefire in Iran.

The pause appears shaky - with Iran keeping the Strait of Hormuz closed in response to Israel's deadly attacks on Lebanon.

The US maintains the ceasefire never applied to Hezbollah.

Negotiations on a longer-term peace agreement are expected in Pakistan this week - attended by US Vice President JD Vance.

CBS Correspondent Linda Gradstein says there've been positive developments.

"Many are hoping, you know, the ceasefire kind of takes on a life of its own and it holds. And, that's what we've seen in Gaza, even though there is still fighting in Gaza."

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• Iran deal a 'total and complete victory' for US, Trump tells AFP
• ‘Choose peace’: Pope marks first Easter under cloud of Mideast war