Nuclear talks resume as West asks whether Iran is serious or stalling

Negotiators in Vienna resumed talks Monday over reviving Iran's 2015 nuclear deal with world powers, with the United States taking part at arms length as in previous rounds since the Trump administration pulled out of the accord three years ago.

Hopes of quick progress were muted after a hard-line new government in Tehran led to a more than five-month hiatus in negotiations. But the European Union official chairing the talks sounded an upbeat note after the first meeting concluded.

I feel positive that we can be doing important things for the next weeks, EU diplomat Enrique Mora told reporters.