London: A no-fly zone has been enforced by France's President Nicolas Sarkozy over his wife Carla Bruni's chic Riviera retreat where the couple is expected to spend their Easter break, a media report said.

An official decree threatens pilots with a fine of up to 40,000 euros or six months in prison for descending below 3,000 feet above 43-year-old Carla Bruni's large seaside villa at Cap Nègre, Lavandou, report says.

The decree came a year after the French First Couple irked locals by declaring beaches surrounding the residence off limits.

The low-fly ban lasts from April 8 to 26, prompting speculation over how long the President intends to prolong his Easter break, the report said.

"While the President's private engagements are never made public, I think we can be rest assured he will take no more than a long weekend or two around Easter given France's current involvements abroad," an Elysée Palace adviser said.