U.S. President Donald Trump warned that the United States could impose tolls on the vital Strait of Hormuz waterway if negotiators are unable to complete a deal to end the war in Iran.

There will be no tolls "unless they are imposed by and for the United States of America, should the deal not be completed, for services rendered as the Guardian Angel to the countries of the Middle East for purposes of both past, present, and future reimbursement of costs," Trump posted on Truth Social.

U.S. Vice President JD Vance expressed hopes on Sunday of turning a "new leaf" during talks with Iran in Switzerland, even as the threat of renewed fighting in Lebanon and lack of consensus on key issues rendered prospects for a permanent deal elusive.

Pakistan said technical talks to implement the U.S.-Iran deal to end the Middle East war would be held in Switzerland on Sunday.

Activists and campaign groups on Saturday paid tribute to Lebanese environmentalist Mona Khalil who died from injuries sustained in an Israeli strike in the country's south, where she dedicated her life to turtle conservation for decades.

Iran said it was once again closing the vital Strait of Hormuz shipping lane on Saturday over Israel's attacks in Lebanon, calling them a violation of its deal with the United States to end the Middle East war.

Lebanon's health ministry said Saturday that Israeli attacks since March 2 when the latest Israel-Hezbollah war began had reached 4,057 dead, including 135 health and emergency workers, and 12,121 people wounded.

Hezbollah lawmaker Hassan Fadlallah on Saturday said his group had the right to respond to Israeli attacks, as Israel kept up strikes on Lebanon despite a new ceasefire announced a day earlier.

The Lebanese Army said an Israeli strike killed one of its soldiers in the country's south on Saturday, despite a new ceasefire deal between Israel and Hezbollah reached a day earlier.

Hezbollah on Saturday said its fighters confronted overnight Israeli forces as they tried to infiltrate towards strategic hills that overlook the southern city of Nabatieh.

Israel carried out deadly strikes in south Lebanon on Saturday and Hezbollah maintained it had the right to respond, hours after the United States announced a renewed ceasefire in fighting that had strained a fledgling deal with Iran.