WASHINGTON/CAIRO, May 9 - The U.S. and Iran appeared no closer on Saturday to finding an end to their war after the two sides traded fire in the Gulf amid a tenuous ceasefire, while a U.S. intelligence analysis concluded Tehran could withstand a naval blockade for months.

Recent days have seen the biggest flare-ups in fighting in and around the Strait of Hormuz since a ceasefire began a month ago, and the United Arab Emirates came under renewed attack on Friday.

Washington has been awaiting Tehran's response to a U.S. proposal that would formally end the war before talks on more contentious issues, including Iran's nuclear program. Speaking in Rome on Friday, Secretary of State Marco Rubio said the U.S. was expecting a response that day, although an Iranian foreign ministry spokesperson said Tehran was still weighing its response.

CLASHES TEST CEASEFIRE

Sporadic clashes continued on Friday between Iranian forces and U.S. vessels in the Strait of Hormuz, Iran's semi-official Fars news agency reported. The Tasnim news agency later cited an Iranian military source saying the situation had calmed but warning more clashes were possible.

The U.S. military said it struck two Iran-linked vessels attempting to enter an Iranian port, with a U.S. fighter jet hitting their smokestacks and forcing them to turn back.

Tehran has largely blocked non-Iranian shipping through the strait since the war began with U.S.-Israeli airstrikes across Iran on February 28. Before the war, one-fifth of the world's oil supply passed through the narrow waterway.

The U.S. imposed a blockade on Iranian vessels last month. But a CIA assessment indicated Iran would not suffer severe economic pressure from a U.S. blockade of Iranian ports for about another four months, according to a U.S. official familiar with the matter, raising questions over President Donald Trump's leverage over Tehran in a conflict that has been unpopular with voters and U.S. allies.

A senior intelligence official characterised as false the “claims” about the CIA analysis, which was first reported by ...