OBBUERGEN, Switzerland (AP) — High-level U.S.-Iran talks on their interim deal to end the war had a tense start Sunday in Switzerland as Tehran took offense at comments by President Donald Trump, who threatened to attack and told Iran's president to watch what he says.

The comments from afar — on social media and to news outlets — complicated efforts by Vice President and mediators Pakistan and Qatar to keep Iran engaged in discussions meant to address thorny issues like Tehran's nuclear program, the and the unfreezing of billions of dollars in Iranian assets.

The Associated Press