US President Donald Trump has threatened to strike Iran's bridges and power plants next week if the country does not return to talks.
The comments, made in a Fox News interview, aired as the two countries exchanged fire for the fourth day in a row.
Trump earlier reversed a threat of a 20% fee on all Strait of Hormuz cargo shipping but resumed blockading Iranian ports.
"Next week it gets really bad for them," Trump said. "We're going to knock out all their power plants. We're going to knock out all their bridges unless they get to the table and negotiate."
As Trump's deadline neared, regional mediator Pakistan asked the US president to extend it by two weeks to "allow diplomacy to run its course".
"Diplomatic efforts for peaceful settlement of the ongoing war in the Middle East are progressing steadily, strongly and powerfully with the potential to lead to substantive results in near future," Prime Minister Shehbaz Sharif wrote on X.
Sharif also asked Iran's leaders to "open Strait of Hormuz for a corresponding period of two weeks as a goodwill gesture".
White House Press Secretary Karoline Leavitt said the president "has been made been aware of the proposal, and a response will come".
