Mayor of Paris Bertrand Delanoe has questioned the tactics of the successful London bid after losing out in the fight to host the 2012 Olympics.
Delanoe congratulated London but said: "I am not quite sure that we took part with the same tools and spirit.
"On Tuesday, as I was going back to my hotel room to go to bed, I saw people coming out from successive meetings with Tony Blair and Sebastian Coe.
"I had not understood that that was the way we should have proceeded."
He added: "I thought that we just needed to provide the best possible bid with the best possible Olympic spirit. And I think this is what most of the IOC members thought about Paris."
But Delanoe vowed that the city would recover from the "immense disappointment" of losing out to London.
"All that has been beautiful, great, strong, collectively generous during our candidacy must not be lost," he said.
"I will use all my energy so that we bounce back, so that we can achieve something great and positive from this."