Donald Trump has given Iran a deadline and threatened to send the country back to the "Stone Ages" if it does not comply by attacking power plants and bridges.
Fears of fuel shortages have been sparked recently as the number of tankers passing through the Strait of Hormuz was reduced to a trickle amid threats from Iran, which experts say effectively controls the waterway.
US vice president JD Vance has flown to Hungary in an attempt to boost its nationalist Prime Minister Viktor Orban's chances in the country's upcoming general election.
Hungarian Prime Minister Viktor Orban has suggested explosives found near a pipeline supplying Russian gas to Hungary and Serbia was "an act of sabotage".
German men aged between 17 and 45 could have to get military approval if they want to leave the country for more than three months, according to recent changes to the law.