Australia, Brazil, Canada, Colombia, Indonesia, Japan, Jordan, Sierra Leone, Switzerland and the UK have voiced concern over the situation in Lebanon, calling for an urgent end to hostilities amid rising regional tensions.

The joint statement reflects growing international alarm over the escalation and its wider spillover risks.

Trump is not pursuing a "small deal" with Iran, the US vice president has indicated, as a ceasefire holds and negotiations continue toward a broader agreement aimed at benefiting the United States, the world, and long-term global stability.

The US military has claimed that there had been no breaches of its naval blockade of Iran in its first 24 hours, with American forces turning back six merchant vessels attempting to leave one of the country’s Gulf of Oman ports.

“No ships made it past the U.S. blockade, and 6 merchant vessels complied with direction from US forces to turn around to re-enter an Iranian port on the Gulf of Oman,” US Central Command (CENTCOM) said in a statement.

The US has described the first direct talks between Israel and Lebanon in more than 30 years as a “huge accomplishment.”

“What I've learned as a diplomat, sometimes just having the meeting…getting all sides in the room…is a huge first accomplishment,” US Ambassador to the UN Mike Waltz said during his remarks at Georgetown University in Washington, DC.

US Vice President JD Vance has said Washington is negotiating with Iran as a fragile ceasefire continues to hold, signalling that diplomatic contact remains active despite wider tensions.

Reuters quoted Vance as saying there is deep mistrust between Washington and Tehran that “cannot be solved overnight”, adding that US President Donald Trump is seeking a broader “grand bargain” rather than a limited deal.

Vessel traffic continues through the Strait of Hormuz as US naval forces implement a blockade against Iranian restrictions on the strategic waterway.

Since the blockade began on Monday at 1400GMT, 14 vessels have entered the Gulf and seven vessels have exited the strait during this period.

A total of 25 ships passed through the strait, while 13 vessels remained there as of 2010GMT on Tuesday, according to Anadolu statistics from relevant sources.

The US Treasury Department issued a sweeping warning to all financial institutions, saying it is ready to apply secondary sanctions on any entity it determines to be working in support of Iranian activities.

The Treasury said it is "moving aggressively with economic fury" to maintain what it called "maximum pressure on Iran" amid a deadlock in direct negotiations.

"Financial institutions should be on notice that the department is leveraging the full range of available tools and authorities and is prepared to deploy secondary sanctions against foreign financial institutions that continue to support Iran’s activities," it said on X.

"The short-term authorisation permitting the sale of Iranian oil already stranded at sea is set to expire in a few days and will not be renewed," it added.

Lebanon's ambassador to the United States Nada Hamadeh Moawad called for a ceasefire during "constructive" talks 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 emphasised "the full sovereignty of the state" over all Lebanese territory.

European countries are putting together a post-war plan for a broad coalition of countries, excluding the United States, to help free up shipping through the Strait of Hormuz, the Wall Street Journal reported, citing officials.