JD Vance has finally departed for Switzerland to lead a new round of talks with Iran about its nuclear program after being delayed a day. 

The Vice President was shown boarding Air Force Two on his way to Switzerland in a video from his press secretary Saturday afternoon in Washington. 

A high-level Iranian team arrived in Switzerland on ​Saturday for peace talks, Iranian state media reported and Pakistan said will begin on Sunday.

The Iranian delegation was led ‌by chief negotiator Mohammad Baqer Qalibaf and included Foreign Minister Abbas Araqchi as well as senior security, central bank and oil officials, Iranian media said.

Vance has been seen as Donald Trump's point man on the negotiations, dating back to failed talks in Islamabad during the earlier months of the war in Iran, which was launched by the US and Israel in late February. 

Although the U.S. and Iran had agreed to a 60-day ceasefire while negotiations take place, Tehran's Islamic Revolutionary Guard Corps on Saturday declared the Strait of Hormuz shut. 

This could complicate talks in which both sides seek to advance an interim deal brokered by Pakistan and signed on Wednesday by Trump and Iranian President Masoud Pezeshkian to end ​their almost four-month war.

The IRGC warned ships would be at risk if they approached the waterway, a vital conduit for global oil and gas supplies. Iran cited what it called Israeli 'crimes' in Lebanon and ​a US violation of commitments to establish a ceasefire.

The Islamic Republic warned all vessels not to approach the shipping lane, which plays a vital role in global trade, and blamed continued Israeli strikes in Lebanon. 

This is a developing story.