Separate talks on Iran and Ukraine-Russia set for Tuesday in Geneva, source says

Two sets of diplomatic negotiations, on Ukraine and Iran, are set to take place in Geneva on Tuesday, a source briefed on the matter told Reuters news agency on Friday.

A US delegation including envoys Steve Witkoff and Jared Kushner will meet with the Iranians on Tuesday morning, the source said. Representatives from Oman will be on hand and mediate the US-Iran contacts, the source said.

Witkoff and Kushner will then participate in trilateral talks with representatives from Russia and Ukraine in the afternoon, the source said.

President Donald Trump is pressuring the Iranian government in the wake of its violent crackdown on protesters and has amassed a large US naval presence in the region.

Meanwhile, the exiled son of Iran's last shah called on US President Donald Trump on Saturday to help the Iranian people and said it was "time to end the Islamic republic".

"To President Trump... The Iranian people heard you say help is on the way, and they have faith in you. Help them," the US-based Reza Pahlavi told reporters at the Munich Security Conference.

Trump had said Friday that a change of government in Iran would be the "best thing that could happen", as he sent a second aircraft carrier to the Middle East to ratchet up military pressure on the Islamic republic.

He is also trying to coax Ukraine and Russia into an agreement to end Moscow's four-year-old invasion of Ukraine.

US Secretary of State Marco Rubio said Saturday that he did not know if Russia was serious about ending its war against Ukraine.

"We don't know if the Russians are serious about ending the war," he told the Munich Security Conference, with the conflict soon set to enter its fifth year.