US says no talk about extending Iran nuclear negotiations

World powers and Iran are not discussing extending a late November deadline for reaching an agreement over Tehran's nuclear programme, a senior US official said on Wednesday, adding there was still time to reach a deal.

The State Department official spoke ahead of a meeting later on Wednesday between US Secretary of State John Kerry, Iranian Foreign Minister Mohammad Javad Zarif and European Union foreign policy chief Catherine Ashton in Vienna.

"We're not talking about extension or anything like that in the room. We're talking about getting this done by the 24th (of November)," the US official said.

Iran and the six major powers aim to end a decade-old dispute over Tehran's nuclear programme by reaching a settlement to curb the country's atomic activities in exchange for a lifting of sanctions hurting its oil-dependent economy.