By Mohammed Ghobari, Tala Ramadan and Timour Azhari

RIYADH, July 13 (Reuters) - Yemen's Houthi movement fired missiles at Saudi Arabia after accusing the kingdom of bombing an airport under their control on Monday, breaking afour-year truce in the conflict between the kingdom and the Iran-aligned group.

Saudi Arabia intercepted missiles "launched by the terrorist Houthi militia toward the southern region," the spokesperson for a Saudi-led military coalition in Yemen said on X.

By Kanishka Singh

WASHINGTON, July 13 (Reuters) - The U.S. military said late on Monday its forces have completed their latest wave of strikes on Iran that the U.S. Central Command began earlier in the day at the direction of President Donald Trump.

• "During the five-hour mission, U.S. forces successfully struck military targets across Iran including Bushehr, Chah Bahar, Jask, Konarak, Abu Musa, and Bandar Abbas," the Central Command said in a statement on X.

By Patricia Zengerle

WASHINGTON, July 13 (Reuters) - U.S. President Donald Trump has sent Congress formal notification that hostilities against Iran resumed on July 7, a letter his administration sees as opening a new 60-day window to use the military in the region without congressional approval.

"I directed this military action consistent with my responsibility to protect Americans and United States' national security and foreign policy interests," Trump said in the letter, dated July 10, and seen by Reuters on Monday.

By Ahmed Rasheed and Muayad Hameed

BAGHDAD, July 13 - Iraq's new prime minister, Ali al-Zaidi, aims to secure major U.S. investment in his country's oil, gas, and power sectors during a visit to the White House this week, after the Iran war hammered crude output and state finances.

Iraq's government is increasingly focused on diversifying international partnerships to better cope with regional instability, analysts say, an agenda expected to take centre stage during the July 13 to July 18 visit.

By Ryan Patrick Jones

July 13 (Reuters) - Four in five Americans expect the U.S. war with Iran to drag on for an extended period, according to a Reuters/Ipsos poll conducted as fighting escalated and President Donald Trump declareda blockade of Iranian shipping in the Gulf.

The three-day poll completed on Sunday found that 79% of respondents think U.S. military involvement in Iran will "go on for an extended period of time," up from 65% in late March. Only 18% of respondents said they think the war would "end pretty quickly in a matter of weeks."

WASHINGTON, July 13 (Reuters) - President Donald Trump told reporters on Monday that the United States was attacking Iran's capabilities related to the Strait of Hormuz, amid renewed military action between the two countries.

The U.S. military said on Monday it was launching fresh strikes against Iran but Trump told reporters at the Oval Office on Monday that he had not decided that a negotiated settlement could not be reached with Tehran.

Trump also said that it could be that there are Iranian drones in Cuba.

JERUSALEM, July 13 (Reuters) - A United Nations official has said Palestinian militant group Hamas was disrupting aid distribution in the Gaza Strip, placing further hardship on its civilians already grappling with the humanitarian crisis in the war-shattered enclave.

In a statement late on Sunday, the U.N.'s humanitarian coordinator for the Palestinian territories said humanitarian workers had to halt activity on Saturday after armed men entered a food distribution point in northern Gaza and assaulted two truck drivers in a World Food Program warehouse.

By Phil Stewart and Idrees Ali

WASHINGTON, July 13 (Reuters) - Democratic senators led by Kirsten Gillibrand called on Monday for President Donald Trump's administration to disclose within the next week the findings from a U.S. military investigation into a Feb. 28 strike at a girls' school in Iran.

Reuters first reported on March 5 that an initial, internal U.S. military investigation showed U.S. forces were likely responsible for the fatal strike in Minab on the opening day of the war with Iran.

LONDON, July 13 (Reuters) - The U.S. military will begin enforcing a maritime blockade on Iran on Tuesday, the U.S. Navy-led Joint Maritime Information Center (JMIC) said on Monday.

The blockade, covering all of Iran's ports, oil terminals and coastal areas, will be enforced for all vessel traffic - regardless of flag - from 2000 GMT on July 14, the center said in an advisory.