As the fragile Iran-Israel truce took hold, there was no letup in Turkey's diplomatic efforts Wednesday to prevent any return to a conflict fraught with risk for Ankara's domestic and regional policies.

Hours after US President Donald Trump announced the ceasefire, Turkey's President Recep Tayyip Erdogan met him for talks on the sidelines of a NATO summit for their third conversation in 10 days.

Erdogan's "intensive diplomatic efforts" to curb the conflict also involved calls with Russia's Vladimir Putin, Iran's Masoud Pezeshkian and top Middle Eastern leaders.

President Donald Trump said Wednesday that the fledgling ceasefire between Israel and Iran was going "very well" and teased new nuclear talks with Tehran, as leaked US intelligence cast doubt on the damage done to the Islamic republic's atomic programme.

Here are the latest developments on the second day of the ceasefire:

- Iran-US talks -

Trump said that the United States would hold fresh nuclear negotiations with Iran, even after boasting that US strikes had crippled its atomic programme.

Arriving in Tel Aviv after 12 days of war with Iran, Dorit Tzarum says among drinks on a crowded beach in the Israeli city that "it feels like California".

The devout Orthodox woman hasn't left her apartment in Jerusalem throughout the missile fire, scrupulously respecting the restrictions imposed by the Israeli government.

Travelling the 70 kilometres (43 miles) to Tel Aviv, she sits with her adult son Yair on a bench to watch the waves after the announcement of a ceasefire between Israel and Iran after 12 days of exchanging strikes.

Efforts to vaccinate children against deadly diseases are faltering across the world due to economic inequality, Covid-era disruptions and misinformation, putting millions of lives at risk, research warned Wednesday.

These trends all increase the threat of future outbreaks of preventable diseases, the researchers said, while sweeping foreign aid cuts threaten previous progress in vaccinating the world's children.

A new study published in The Lancet journal looked at childhood vaccination rates across 204 countries and territories.

It was not all bad news.

Elon Musk's AI chatbot Grok produced inaccurate and contradictory responses when users sought to fact-check the Israel-Iran conflict, a study said Tuesday, raising fresh doubts about its reliability as a debunking tool.

With tech platforms reducing their reliance on human fact-checkers, users are increasingly utilizing AI-powered chatbots -- including xAI's Grok -- in search of reliable information, but their responses are often themselves prone to misinformation.

With his surprise announcement of a ceasefire between Israel and Iran, US President Donald Trump has turned his flair for social media into diplomatic deftness, despite continued uncertainty in the Middle East.

Israel, Iran and Trump himself all declared victory after 12 days of conflict that culminated Saturday in the United States bombing Iran's key nuclear sites.

A classified preliminary US intelligence report has concluded that American strikes on Iran set back Tehran's nuclear program by just a few months -- rather than destroying it as claimed by President Donald Trump.

US media on Tuesday cited people familiar with the Defense Intelligence Agency (DIA) findings as saying the weekend strikes did not fully eliminate Iran's centrifuges or stockpile of enriched uranium.

The aerial bombardments and missile strikes sealed off entrances to some facilities without destroying underground buildings, according to the report.

Israeli Prime Minister Benjamin Netanyahu declared a "historic victory" against Iran despite a US intelligence report concluding that American strikes set back Tehran's nuclear program by just a few months.

Iran and Israel agreed a ceasefire on Tuesday ending 12 days of tit-for-tat strikes, after US President Donald Trump joined the conflict with bunker-busting bombs at the weekend that he said destroyed key Iranian nuclear sites.

At his grocery store in an Iranian neighborhood of Los Angeles, Mohammad Ghafari is worried sick about his brothers and sisters since the United States bombed the Islamic republic's nuclear sites.

But as he stands among his dates, dried plums and pistachios, he also cherishes the hope of change in his native country.

Iran "is not capable of providing food to the Persian people," said Ghafari, who left to study abroad before the 1979 revolution and never returned.

"If the people (there) were happy about a change of regime, I would be too."

Iran's unprecedented strikes on a US base in Qatar were carefully calculated to provide an exit from hostilities with Washington and set up a truce with Israel, according to analysts and an official.

Monday's missile launches were signalled well in advance, minimising the risk of injury and giving every opportunity to shoot down the projectiles -- resulting in a fireworks display of booms and flashes above Doha.