Iranian President Hassan Rouhani has been met by a crowd of opponents and supporters on his return to Tehran after a visit to the UN in New York that included a phone call with US President Barack Obama.
Scuffles broke out between the rival camps at Tehran's Mehrabad airport, as supporters chanted: "Thank you, Rouhani" while opponents shouted: "Death to America" and "No compromise with the US - only war."
Nearly 60 protesters were outnumbered by 200 to 300 supporters of the president, who were separated by a small contingent of police.
A shoe was thrown as Rouhani stood up through the sunroof of his car to acknowledge the crowd but it failed to hit its target.
Rouhani and Obama spoke on the telephone on Friday - the first such communication between a United States and Iranian president since 1979.
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
It was part of diplomatic efforts to resolve concerns over Iran's nuclear program.
Rouhani told reporters at the airport that it had been Obama's initiative to make the call.
"We were going to the airport, when I was informed that the White House had called the mobile phone of our ambassador to the UN," his office quoted him as saying.
"I was informed President Obama wanted to speak to me for a few minutes."
Obama said later that while "important obstacles" remained, he believed there was a "basis for resolution" of the Iranian nuclear issue.
Rouhani insisted that he had created the "environment" that would help negotiations to end the dispute over his country's nuclear program.
Iran denies accusations it has a nuclear weapons program, arguing that its nuclear intentions are peaceful.
