(VOVworld) - Negotiations over Iran’s nuclear program have reached an impasse after 4 days of talks in Vienna when the deadline for a comprehensive final deal is next Monday.

US Secretary of State John Kerry, left, is greeted by French foreign minister Laurent Fabius prior to their meeting at the foreign ministry in Paris Thursday, Nov. 20, 2014. (US State Department)

Foreign ministers from Iran and the P5+1 group to the highly complicated talks remained seriously divergent from many issues, particularly the scale of uranium enrichment and the progress to loosen sanctions on Iran. On Friday, US Secretary of State John Kerry met his British and French counterparts to debate next steps to avoid the negotiations from possibly being failed or to agree with a proposal to keep talking.

Currently the group involving the US, Britain, France, China, Russia, and Germany want Iran to reduce half of its uranium enrichment centrifuges and in return for this reduction, Tehran requires the west to lift their sanctions imposed on the country.

Meanwhile Russian Deputy Foreign Minister Sergei Ryabkov said to handle the issue, it’s necessary to have a UN Security Council resolution and concessions from both sides.