VIENNA, July 13 (Xinhua) -- The talks here on the Iranian nuclear programs continued on Sunday as big differences still remain between Iran and the West.
The negotiations will continue and the talks on Sunday "are useful", French Foreign Minister Laurent Fabius told reporters following the talks on Sunday afternoon.
Senior U.S. and British diplomats said earlier on Sunday the ongoing negotiations here on the disputed Iranian nuclear programs are "unlikely" to reach a breakthrough soon, as a proposed deadline for a deal is approaching within a week.
A "quick breakthrough" is unlikely to reach during the talks over Iran's nuclear program due to "significant gaps", British Foreign Secretary William Hague said.
"There are very significant gaps, that is very clear," Hague said upon his arrival for the talks.
"It is unlikely that there will be a quick breakthrough today," said Hague.
Earlier in the day, U.S. Secretary of State John Kerry also said there still exists major differences between Iran and the six world major countreis attending the talks.
"And obviously we have some very significant gaps still," said Kerry, who arrived in Vienna to join the talks, adding "So we need to see if we can make some progress."
"It is vital to make certain that Iran is not going to develop a nuclear weapon and that their program is peaceful. That's what we're here to try to achieve. And I hope we can make some progress on it," Kerry said.
After one-week intensive negotiations in the capital city of Austria, Iran and the so-called P5+1 states, the five permanent members of the United Nations Security Council plus Germany, made some progress but on some key issues Iran and the world major countries remained far apart.
The six major countries are now working with Iran in Vienna to try to find a comprehensive solution to the decade-long standoff between Iran and the West over Tehran's nuclear program by the proposed deadline of July 20.
The West wants Iran to significantly scale back its nuclear program to address its concern of proliferation risk, while Iran insists its nuclear right is inalienable.