The powers leading negotiations with Iran on its nuclear program are "not discussing an extension" of this week’s deadline, US Secretary of State John Kerry said in Paris Thursday.

The powers leading negotiations with Iran on its nuclear program are "not discussing an extension" of this week's deadline, US Secretary of State John Kerry said in Paris Thursday.

"We are not discussing an extension, we are negotiating to have an agreement," Kerry told reporters, in response to statements by his British counterpart Philip Hammond this week casting doubt over Monday's deadline for a deal.