Some residents of Tehran on Sunday chanted slogans against the clerical leadership from balconies and windows, reports said, a day after Iranians abroad staged giant opposition rallies in Europe and North America.

Israeli Prime Minister Benjamin Netanyahu said on Sunday that any deal between the United States and Iran must involve the removal of all enriched uranium from Iran as well as Tehran's ability to enrich more.

EU top diplomat Kaja Kallas pushed back Sunday against Europe "bashing" by the United States, as she said Russia must be forced to make concessions in talks to end the Ukraine war.

"Contrary to what some may say, woke, decadent Europe is not facing civilisational erasure," Kallas said on the last day of the Munich Security Conference.

The exiled son of Iran's last shah said he was ready to lead the country to a "secular democratic future" at a rally in Munich on Saturday, after U.S. President Donald Trump said a change of power would be the "best thing".

U.S. Secretary of State Marco Rubio said Saturday that he did not know if Russia was serious about ending its war against Ukraine, as Washington pushes for a swift peace deal.

The U.S. and Iran are expected to hold a second round of nuclear talks in Geneva next Tuesday in an effort to reach a deal that prevents war, a U.S. official and three sources with knowledge told U.S. news portal Axios.

U.S. President Donald Trump said that a change in power in Iran "would be the best thing that could happen" as the U.S. administration weighs whether to take military action against Tehran.

With one American carrier strike group already in the Middle East and another apparently on its way as U.S. President Donald Trump ramps up pressure on Iran to give up its nuclear program, fears are rising of the outbreak of another war that could spread into a regional conflict.

The 12-day Israel-Iran war last year appeared to cripple key elements of Iran's military, yet left its capabilities far from neutralized — a distinction that looms large as tensions rise again.

Britain's High Court ruled Friday that the government's decision to outlaw the protest group Palestine Action as a terrorist organization was unlawful, but it kept the ban in place pending another hearing while the government prepares an appeal.

Judges Victoria Sharp, Jonathan Swift and Karen Steyn said "the nature and scale of Palestine Action's activities" did not meet the "level, scale and persistence" that would justify proscription.

U.S. Secretary of State Marco Rubio met his Chinese counterpart Wang Yi Friday on the sidelines of the Munich Security Conference, an AFP journalist said, at a time of heightened Washington-Beijing tensions.

The meeting came days after U.S. President Donald Trump said he would host Chinese leader Xi Jinping at the White House late this year, as the world's two biggest economies look to reset ties marred by a trade war.