The US Defense Secretary said the Navy's blockade around the Strait of Hormuz, a narrow sea passage next to Iran through which much of the world's oil passes, can go on indefinitely.
The United States is sending a second aircraft carrier, the USS George Washington, to join the USS Abraham Lincoln near Iran, giving it two carrier groups in the region.
Rostec, the Russian state company that builds most of Russia's weapons, has been under European Union sanctions since 2022.
Iran has said it will only reopen the Strait of Hormuz, a narrow sea passage that much of the world's oil ships through, if the United States lifts its economic sanctions on Iran.
Russia's President Vladimir Putin threatened to seize ships flying European Union flags anywhere from the Black Sea to the Pacific Ocean.
Two US human rights groups, DAWN and the Taxpayer Alliance Against Genocide, are suing the Trump administration over sanctions it placed on the International Criminal Court, the world's top war-crimes tribunal.
President Trump said the United States is taking a low-key approach in its standoff with Iran, preferring economic pressure over military action.
An oil tanker near Oman reported hearing two explosions in the Strait of Hormuz, the narrow sea passage Gulf countries use to ship oil to world markets.
The European Commission has given Ukraine an initial €1.4 billion, paid for not with Russia's frozen central bank reserves themselves but with the interest those reserves have earned since being frozen after Russia's 2022 invasion.
China announced new measures against the United States, including putting American firms on a trade blacklist and tightening controls on drone exports.
A Ukrainian drone strike hit an industrial area outside Moscow, killing five people and wounding six, according to the regional governor.
Chinese companies are giving Iran satellite reconnaissance help and drone parts, while China keeps buying Iranian oil, according to Swiss newspaper Neue Zürcher Zeitung.