Authorities were left red-faced after an announcement they had arrested the three men at a Paris airport turned out to be false.
To make matters worse, it emerged the suspected French jihadists had been put on a different plane entirely to the southern city of Marseille where they were -- to their apparent surprise -- able to walk freely from the airport yesterday.
In another snag, passport control failed to flag the men as suspicious, as a security databank was out of order at the time, police sources told AFP.
"There was clearly a massive bungle but it was in large part due to ... The absence of proper collaboration with Turkish authorities," Defence Minister Jean-Yves Le Drian told France Info radio.
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The trio included the 29-year-old brother-in-law of Toulouse jihadist Mohamed Merah, who was shot dead by police after he murdered seven people, including three children, in a 2012 killing spree.
A 27-year-old previously convicted over terrorism-related charges and links to a jihadist group, was also one of the three arrested in Turkey.
But it insisted that Paris did not become aware of the last-minute change of plan until after the men had landed on French soil.
One of the trio's lawyers, Pierre Dunac, said the men were not questioned when they landed. "As incredible as it might seem, it's true."
The debacle came as France was juggling several extremist threats: Hundreds of citizens leaving to fight in Iraq and Syria, a national taken hostage and threatened with execution in Algeria and Islamic State jihadists calling for Muslims to kill French citizens.
"France is not afraid," Interior Minister Bernard Cazeneuve insisted this week, vowing the country was fully prepared to deal with any threat on home soil.
Critics of an already deeply unpopular government seized on the blunder, saying the jihadists had "made us the laughing stock of the world."
"So we can send planes to Iraq but we can't control our own borders?" said Christian Estrosi, a former government minister with the conservative opposition UMP.
The three men were thought to have been arrested in Turkey on suspicion of being part of a network that recruited jihadists for Syria.