71 killed in Israeli attack on Iran prison, official says

President Donald Trump posted on social media late Monday evening -- about four hours after making the announcement of the ceasefire between Israel and Iran -- that both countries approached him "almost simultaneously" seeking peace.

I knew the time was NOW," Trump posted on Truth Social. "The World, and the Middle East, are the real WINNERS! Both Nations will see tremendous LOVE, PEACE, AND PROSPERITY in their futures. They have so much to gain, and yet, so much to lose if they stray from the road of RIGHTEOUSNESS & TRUTH. The future for Israel & Iran is UNLIMITED, & filled with great PROMISE. GOD BLESS YOU BOTH!"

-ABC News' Kelsey Walsh

Iranian Foreign Minister Abbas Araghchi said on social media there is "NO 'agreement'" on a ceasefire following President Donald Trump's announcement.

However, he said if Israel halted strikes by 4 a.m Tehran time (8:30 p.m. EDT) "we have no intention to continue our response afterwards," he said.

He said a final decision "on the cessation of our military operations" would be made later.

He later thanked Iranian armed forces who he said "responded to any attack by the enemy until the very last minute."

Director of National Intelligence Tulsi Gabbard praised what she called a "historic" ceasefire agreement between Iran and Israel, crediting President Donald Trump with brokering the deal and calling it a "herculean effort."

Gabbard had been at the White House in recent days as diplomatic talks intensified and airstrikes escalated, alongside senior staff and Cabinet officials.

Last week, Trump has expressed frustration with Gabbard's previous comments, saying she was "wrong" when she told Congress in March there was no evidence Iran was building a nuclear weapon.

As a 2020 Democratic candidate, Gabbard was adamant in her opposition to "regime change wars" and war with Iran, so much so that she sold campaign t-shirts that said, "No War With Iran."

In an additional statement to ABC News on Monday night, Gabbard said the U.S. strike against Iran obliterated "key Iranian capabilities needed to quickly assemble a nuclear weapon."

"The operation was a resounding success," Gabbard added

-ABC News' Beatrice Peterson

Since the State Department began assisting departure flights for American nationals from Israel on Saturday, there have been a total of seven flights that have left the country, a State Department official told ABC News.

Approximately 250 U.S. citizens and lawful permanent residents, and their accompanying immediate family members, were aboard the flights, the official said.

The flights have arrived in Athens, Greece; Rome, Italy; and Larnaca, Cyprus.

-ABC News' Shannon Kingston