Tags: Iran

A few brief encounters between Barack Obama and Vladimir Putin during an Asia-Pacific summit in China on Tuesday spoke volumes about the chilly state of relations between the United States and Russia.

Iran has stopped a controversial practice that could allow it to enrich uranium faster, the United States said on Monday, ceasing an activity one expert saw as violating an interim nuclear deal.

Iran, the United States and the European Union began an unscheduled second day of talks on Monday over disagreements blocking the resolution of a confrontation over Tehran's nuclear programme, U.S. and Iranian officials said.