Iran said it has again closed the Strait of Hormuz, less than 24 hours after agreeing to a two-week ceasefire with the United States.
The move came after Israeli strikes in Lebanon killed more than 100 people on Wednesday. Israel has said its campaign against Hezbollah in Lebanon will continue despite the ceasefire with Iran.
The ceasefire between Iran and the US was reached earlier in the day, with direct talks expected to take place in Islamabad.
US Defence Secretary Pete Hegseth said Iran had "begged" for the ceasefire. He also claimed Iran's supreme leader, Mojtaba Ali Khamenei, had been "injured and disfigured.
US President Donald Trump said the US and Iran would "work closely" and that there would be "no enrichment of Uranium".
Despite the ceasefire, explosions were reported on Wednesday at the Lavan refinery in Iran and on Sirri Island.
India welcomed the ceasefire but called for free movement through the Strait of Hormuz. In a statement, the Ministry of External Affairs said it hoped the agreement would lead to lasting peace in West Asia and stressed the need for dialogue and diplomacy.
The ministry also said the conflict had disrupted global energy supplies and trade networks and called for uninterrupted navigation through the Strait of Hormuz.
The ceasefire was reportedly brokered by Pakistan with support from China and came shortly before a White House deadline for possible US military action against Iran. However, the situation remains unstable, with missile alerts continuing across the Gulf.