President Trump says US Navy will begin blockade of Strait of Hormuz

President Donald Trump says he has agreed to suspend a planned bombing attack on Iran for two weeks if Iran agrees to reopen the Strait of Hormuz.

In the post on his social media platform, less than two hours before a self-imposed deadline in which he had threatened "a whole civilization will die," Trump cited conversations with Pakistani officials, including Prime Minister Shehbaz Sharif, who have been negotiating an off-ramp.

In the post, Trump said, "subject to the Islamic Republic of Iran agreeing to the COMPLETE, IMMEDIATE, and SAFE OPENING of the Strait of Hormuz, I agree to suspend the bombing and attack of Iran for a period of two weeks. This will be a double sided CEASEFIRE!"

In the post, Trump said the U.S. has received a 10-point proposal from Iran and "believe it is a workable basis on which to negotiate. Almost all of the various points of past contention have been agreed to between the United States and Iran, but a two week period will allow the Agreement to be finalized and consummated."

As Trump's deadline for Iran looms, an Islamic Revolutionary Guard Corps spokesman, Ebrahim Zolfaghari, released a statement Tuesday about Iranian attacks on Israel and U.S. interests in the Middle East, saying they will continue to be "heavier and more massive."

“The wave of effective and devastating attacks by the Iranian armed forces against the military, security, and economic infrastructure of the Zionist regime in the occupied territories and centers related to the criminal America in the region will continue, heavier and more massive," Zolfaghari said.

The spokesperson said the IRGC would target "infrastructure of the US and its allies to deprive them of the region's oil and gas for years and force them to leave the region.”

The Israel Defense Forces have detained a United Nations peacekeeper in Lebanon "after blocking a logistics convoy," the United Nations Interim Force in Lebanon said in a statement Tuesday.

"Following direct and immediate contacts by UNIFIL's Head of Mission & Force Commander and our Liaison Branch, the peacekeeper was released in less than an hour," UNIFL said.

"Any detention of a United Nations peacekeeper is a blatant violation of international law. Any interference with the work of peacekeepers is also a violation of resolution 1701," UNIFIL added.

President Donald Trump has been made aware of Pakistan's proposed two-week deadline extension and "a response will come," White House press secretary Karoline Leavitt told ABC News.

-ABC News' Fritz Farrow