Iran's military warned on Wednesday it would block trade through the Red Sea, along with the Gulf and Sea of Oman, if the U.S. naval blockade continues.

In a statement carried by Iranian state television, the head of Iran's military central command center said if the U.S. continues with its blockade and "creates insecurity for Iran's commercial vessels and oil tankers", it will constitute "a prelude" to violating the ceasefire.

Israel's military on Wednesday issued a fresh evacuation order for residents of south Lebanon despite talks held Tuesday in Washington.

"The airstrikes are ongoing as the Israel Defense Forces operate with significant force in the area. Therefore... we reiterate our urgent appeal for you to evacuate your homes immediately and head north of the Zahrani River," it said in a statement.

The Israeli military has said that three Hezbollah militants were brought to Israel for questioning after surrendering during close-quarters combat in southern Lebanon.

"Yesterday, IDF soldiers engaged in close-range combat with a Hezbollah terrorist cell in Bint Jbeil," the military said.

Israel's army said Hezbollah militants fired around 30 rockets into northern Israel early on Wednesday, just hours after Washington hosted the first direct talks between Israel and Lebanon in decades.

The military detected "approximately 30 launches" towards Israel since the early hours, a spokesman told AFP.

Two Israeli strikes on Wednesday hit vehicles south of Beirut, state media reported, while Hezbollah launched rockets at Israel, hours after Lebanon and Israel agreed to hold direct negotiations.

Israel is continuing its strikes on southern Lebanon, but has not targeted the Lebanese capital since a series of attacks across the country on April 8 that killed more than 350 people.

U.S. President Donald Trump told the New York Post on Tuesday that a second round of Iran talks could happen in Pakistan "over the next two days," after a first round ended at the weekend without a deal.

Lebanon's ambassador to the United States Nada Hamadeh Moawad called for a ceasefire during "constructive" talks on Tuesday with Israeli officials in Washington, she said in a statement.

The "preparatory meeting was constructive," the envoy's statement said, adding that she "called for a ceasefire" and the return of displaced people to their homes, and also emphasized "the full sovereignty of the state" over all Lebanese territory.

Israel and Lebanon agreed to hold direct negotiations after "productive discussions" between the two sides in Washington, the United States said on Tuesday.

"The participants held productive discussions on steps toward launching direct negotiations between Israel and Lebanon," State Department spokesperson Tommy Pigott said in a statement, adding: "All sides agreed to launch direct negotiations at a mutually agreed time and venue."

Direct talks between Israel and Lebanon concluded in Washington on Tuesday, with Israel's envoy hailing a "wonderful exchange" and saying the two countries are "on the same side" in opposing Hezbollah.

President Joseph Aoun expressed hope that direct talks on Tuesday in Washington with Israel would lead to an end of the country's suffering after war erupted again between Israel and Hezbollah last month.

"I hope that the meeting in Washington... will mark the beginning of the end of the suffering of the Lebanese people in general, and those in the south in particular," Aoun said in a statement, adding that "stability will not return to the south if Israel continues to occupy its lands."