The European Union's foreign affairs chief, Josep Borrell, travelled to Iran to meet with the country's leaders amid high regional tensions. The visit is viewed as the latest move by the EU to save the 2015 nuclear deal between Tehran and world powers. Tensions between Iran and the US have steadily risen since President Donald Trump withdrew from the nuclear agreement and re-imposed sanctions in 2018. Tehran responded by gradually rolling back its commitment to the deal. Mr Borrell will meet with Iranian Foreign Minister Javad Zarif and other Iranian officials on Monday, state news agency IRNA said on Sunday. The visit is the first by the EU official after taking office. Mr Borell met Mr Zarif in Brussels in January, when European foreign ministers organised a special meeting to discuss the ongoing crisis. After a US drone attack that killed Iranian general Qassem Suleimani in January, Iran said it would no longer respect limits set on how many centrifuges it can use to enrich uranium. Mr Zarif said the move was a "remedial step" taken within the framework of the nuclear deal. He said it could be reversed. The deal was aimed at capping Tehran's nuclear activities in return for the lifting of sanctions. Iran signed the accord with the United States, France, Germany, the United Kingdom, Russia and China.