France said Monday world powers were close to a long-awaited agreement with Iran on its disputed nuclear program, despite failure to reach a deal at negotiations in Geneva that some blame on Paris.

"We are not far from an agreement with the Iranians but we are not there yet," Foreign Minister Laurent Fabius said on Europe 1 radio.

Oil prices rose in Asian trade Monday after marathon talks in Geneva aimed at convincing Iran to halt its disputed nuclear program ended without an agreement, analysts said.

New York's main contract, West Texas Intermediate (WTI) for December delivery, was up 15 cents to $94.75 in afternoon trade, while Brent North Sea crude for December rose 42 cents to $105.54.

Any deal between world powers and Iran that does not demand a complete halt to uranium enrichment will give Tehran the opportunity to acquire nuclear weapons, an exiled opposition group cautioned Sunday.

The warning by the National Council of Resistance of Iran -- which has made significant revelations about Tehran's nuclear drive in the past -- came hours after world powers failed to clinch an agreement after marathon three-day talks in Geneva.

A deal between world powers and Iran on Tehran's nuclear program is within reach, British Foreign Secretary William Hague said Sunday following talks in Geneva.

"It is vital to keep the momentum," Hague told BBC television. "A deal is on the table and it can be done."

Prime Minister Benjamin Netanyahu said Sunday that Israel would do all it could to keep world powers from striking a "bad and dangerous" deal with Iran over its nuclear program.

Netanyahu said he had spoken with leaders of the United States, Russia, France, Germany and Britain -- five of the six world powers negotiating with Iran -- and told them the mooted deal was "bad and dangerous."

Israel plans to lobby the U.S. Congress to prevent a deal being reached on Iran's nuclear program, Economy Minister Naftali Bennett said Sunday ahead of the November 20 resumption of talks.

"Before the talks resume, we will lobby dozens of members of the U.S. Congress to whom I will personally explain during a visit beginning on Tuesday that Israel's security is in jeopardy," he told army radio.

President Hassan Rouhani said on Sunday that Iran will not abandon its nuclear rights, including uranium enrichment, media reported a day after a fresh round of talks with world powers.

"There are red lines that must not be crossed," Rouhani told the conservative-dominated parliament in remarks quoted by the ISNA news agency.

Chinese Vice Foreign Minister Li Baodong arrived in Geneva Saturday evening for crucial talks on Iran's nuclear program, an Agence France Presse reporter said.

Li was the last high-level diplomat to rush to the Swiss city to take part in crunch negotiations aimed at ending a decade-long standoff between world powers and Iran over its nuclear program.

The Iranian press was divided Saturday over the prospect of a landmark nuclear deal with world powers, with reformist newspapers cautiously optimistic but hardline titles wary of a trap.

Newspapers of all persuasions underlined the limited relief from crippling Western economic sanctions that Tehran was likely to secure in any agreement struck in Geneva.

French Foreign Minister Laurent Fabius said Saturday there was "no certainty" at this stage that a deal on Iran's disputed nuclear program could be reached between Tehran and world powers in Geneva.

Speaking to France Inter radio from the Swiss city as a third day of talks opened, Fabius also pointed to a need to take into account "concerns" from Israel.