PARIS, May 5, 2025 (BSS/AFP) - French police have arrested seven people after a weekend raid to free a man who was kidnapped in Paris to force his crypto-millionaire son to pay a ransom, prosecutors said.

The man, whose identity was not disclosed, was traced to an address in the Essonne department south of Paris that police raided late on Saturday, the prosecutors' office said in a statement.

He had been abducted in Paris's southern 14th arrondissement mid-morning on Thursday.

One police officer, speaking to AFP on condition of anonymity, said four men wearing ski masks bundled him into a delivery van as passers-by looked on.

"The victim appears to be the father of a man who made his fortune in cryptocurrencies, with the crime involving a ransom demand," the prosecutors' statement said.

Prosecutors gave no indication of the size of the ransom demanded, but Le Parisien newspaper reported that the kidnappers had asked for five million to seven million euros ($5.7 million to $7.9 million). No payment was made, officials said.

A source close to the investigation told AFP that one of the father's fingers had been chopped off.

"There were fears of other mutilations" if police had not raided the property, the source said.

French Interior Minister Bruno Retailleau hailed the "decisive" police operation to free the man, in a message on X.

- Kidnapping, torture, blackmail -

The victim's wife told investigators that her husband and the wealthy son -- who both owned a crypto marketing firm in Malta -- had been targeted by threats in the past, a police source said.

Backed up by the French police's cybercrimes unit, anti-gang investigators are probing the suspects for conspiracy to commit unlawful imprisonment, kidnapping, torture, blackmail and armed extortion.

The kidnapping followed a similar abduction on January 21 of a French crypto boss and his partner.

That victim, David Balland, had co-founded a crypto firm, Ledger, valued at the time at more than $1 billion.

Ballard's finger was cut off by his kidnappers, who had demanded a hefty ransom.

He was freed the next day, and his girlfriend was found tied up in the boot of a car in the Paris suburb of Essonne.

None of the suspects is under criminal investigation in that case, including the suspected ringleader, a 26-year-old with a police record for a previous kidnapping.

Earlier in January, a 56-year-old man was found in the boot of a car near the city of Mans, with several media outlets reporting he was the father of a crypto-influencer based in Dubai who boasted online of his profits.