A Hong Kong businessman and his son have surrendered to police over their role in the abduction of a cryptocurrency investor, the Post has learned.

The pair, accompanied by their lawyer, turned themselves in at Tai Po Police Station on Wednesday afternoon, a source familiar with the case said on Thursday.

Police arrested the man, 70, and his son, 30, on suspicion of false imprisonment and assault, according to the force.

The two suspects were still being held for questioning as of Thursday morning.

The insider said the two suspects were not the captors who bundled the victim, 55, into a seven-seater vehicle after dragging her out of her car at Tai Lau Leng Village off Po Shek Wu Road in Sheung Shui at around 8.45pm on Tuesday. She was freed about an hour later.

But he said investigations revealed the car used in the abduction belonged to the suspects’ family.

An insider says the businessman allegedly invested HK$15 million in virtual currency through the victim. Photo: Shutterstock

The source said the businessman allegedly invested about HK$15 million (US$1.9 million) in virtual currency about 18 months ago through the woman, whom he had known through referrals.

He said preliminary investigations suggested the businessman was unable to get the money and the woman was sometimes unreachable.

During the abduction, the woman’s husband, 43, was attacked with a stun gun when he tried to intervene.

The couple suffered injuries mainly to their limbs and they were sent to hospital for treatment.

As of midday on Thursday, police were still searching for the four captors who abducted the cryptocurrency investor and assaulted her husband.

“We do not rule out the possibility that the four men were paid to carry out the job,” the source said.

Detectives from the Tai Po district crime squad are investigating the city’s second abduction in 32 hours.

On Monday, police rescued a 47-year-old woman in Ma On Shan about six hours after she was bundled into a car by two men in the city’s bustling Tsim Sha Tsui shopping district at around midday.

Police arrested two men aged 34 and 39, and a woman, 53, in connection with the case within 12 hours after the abduction.

Inspector Chan Kwan-to of the Yau Tsim district crime squad said on Tuesday that the case was linked to a financial dispute between the victim and the 34-year-old man involving HK$100,000.

He said the abduction occurred about six hours before the 39-year-old suspect allegedly tried to use joss sticks and candles to burn the wooden door of the victim’s home, but in vain.

Police handled 10,122 reports of violent crimes last year, up by 14.6 per cent on the 8,830 cases logged in 2022.