Iran talks should have December deadline: Sarkozy

PARIS (Reuters) - Major world powers should set a December deadline for talks with Iran to bear fruit before moving ahead with new sanctions, French President Nicolas Sarkozy said in a television interview Wednesday.

The U.N. Security Council has demanded that Iran suspend its nuclear enrichment program, which many countries suspect is aimed at developing an atomic bomb. Iran has refused, but has agreed to hold broad talks with six big powers on October 1.

Speaking from New York, Sarkozy said dialogue with Iran was not going well, adding: "There will be a deadline, which in my mind is the month of December."

Iran says it is working on a civilian nuclear energy program and is committed to non-proliferation safeguards.

Speaking later at the United Nations, Sarkozy said Iran would be making a "tragic mistake" if it thought the world would not respond to its nuclear program.

Sarkozy, who has been one of the harshest critics of Iranian President Mahmoud Ahmadinejad, also dismissed a suggestion from Tehran that Paris should accept a prisoner swap to secure the release of a French teaching assistant charged with spying.

"No. This is blackmail," Sarkozy said.

Clotilde Reiss is on bail and staying in the French embassy in Tehran pending a verdict in a mass trial where she has been accused of aiding an alleged Western plot following Iran's disputed presidential election in June.

In an interview with France 2 television aired Tuesday, Ahmadinejad suggested that France could release Iranian prisoners here if it wanted to help Reiss.

He did not name any prisoners, but the highest profile Iranian detainee in France is Ali Vakili Rad, who was found guilty in 1994 of the 1991 murder of Shapour Bakhtiar, who had served as prime minister under the former Shah of Iran.

"Clotilde Reiss is innocent," Sarkozy said. "Do you think that I am someone who would swap the murderer of Shapour Bakhtiar for a young French student whose only crime is to speak the Iranian language and love Persian civilization?"

(Reporting by Crispian Balmer; editing by James Mackenzie)