In his post, Mr. Trump also signaled that a deal would include the United States lifting its naval blockade, which had targeted Iranian ships and ports, to allow the strait, a crucial waterway for oil and gas shipping, to reopen. “Ships caught in the Strait due to our amazing and unprecedented Naval Blockade, which will now be lifted, may start the process of ‘heading home!’” he wrote.

U.S. officials said on Thursday that the proposed deal would extend the cease-fire to pave the way to more talks on Iran’s nuclear program. The officials, who were not authorized to speak publicly, were granted anonymity to discuss the U.S. view of the current negotiations.

Should an agreement be finalized, it could give Mr. Trump an off-ramp from a war that has driven up oil prices and grown deeply unpopular at home. It could also eventually allow Iran to regain access to frozen overseas assets and provide a route for Tehran to get billions of dollars of oil revenue flowing again.

While Iran made no immediate comment on Mr. Trump’s social media post, Iran’s lead negotiator, Mohammad Bagher Ghalibaf, struck a hard-line tone earlier on Friday, saying his country had “no trust in guarantees or words.”

Here’s what else we’re covering:

• The framework: Some details about a draft agreement emerged on Thursday, according to officials involved in the negotiations. Read more ›

• Gaza: Prime Minister Benjamin Netanyahu of Israel said Thursday that he had directed the Israeli military to expand its control of the Gaza Strip to 70 percent. Negotiations on Gaza’s future have stalled over Hamas’s refusal to disarm and Israel’s nearly daily strikes in the enclave, both in apparent defiance of the cease-fire agreement struck in October, after two years of war. Read more ›

• Lebanon: The Israeli military kept up its offensive against Hezbollah, the Iran-backed militia, in Lebanon on Friday, a day after striking Beirut for the first time in almost a month. Lebanese and Israeli military officials are set to meet at the Pentagon on Friday to continue U.S.-brokered talks.

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