Vienna - Talks seeking a landmark nuclear deal between Iran and major powers may yet fail, a German diplomatic source said on Monday during a break in negotiations in Vienna on the eve of a deadline.
"We are not there yet... We should not underestimate that important questions remain unresolved. There will not be an agreement at any price. If there is no movement in decisive areas a failure is not ruled out," the source said.
The comments came after a day of talks between the foreign ministers of Iran and six major powers - the United States, Russia, China, Britain, Germany and France - in the Austrian capital.
They are seeking an accord that ends a 13-year-old stand-off over Iran's nuclear programme by scaling down its activities in return for relief from painful sanctions.
Last week an earlier deadline was effectively extended by seven days to July 7 by extending the terms of an interim deal from November 2013.
But on Monday an Iranian official suggested that his delegation had never really considered Tuesday as a deadline.
"July 7, July 8, we do not consider these dates as those dates we have to finish our job," the official, who asked not to be named, told reporters.