Precise details were unclear but the officials said the U.S. demanded a commitment from Iran on uranium as part of any initial agreement.
PresidTrump provided few details about the preliminary agreement, which he said was “largely negotiated.”
Saturday’s strikes damaged a main hospital in the Lebanese city of Tyre, as funerals for paramedics killed a day earlier were held.
As people across the Middle East braced for the possibility of renewed fighting, officials from both sides said there were signs that they were moving closer to an agreement.
A partner in the war, Israel has been largely left out of the peace talks, a humbling setback for its prime minister with significant risks for the country.
Iran is trying to assert its control over the strait by charging for passage. Experts say it is unlikely to happen, but the threat has unsettled the shipping industry.
There is no shortage of targets should President Trump, in coordination with Israel, decide to resume the assault on Iran.
There is no shortage of targets if he decides to strike: Energy facilities left untouched, the deep underground nuclear storage site at Isfahan and missile sites that appear to have been dug out.
Pakistan and Qatar have dispatched teams to Iran under the looming threat of resumed war, after weeks of diplomacy failed to produce an agreement.
The discussions suggest that the United States and the Iranian government may not be close to reaching a deal to end a war that has badly damaged the global economy.