American entrepreneur Zaryn Dentzel, the co-founder of "the Spanish Facebook" Tuenti, has told police he was tortured by a group of masked men who targeted his bitcoin millions.

Dentzel, 38, said a group of five men entered his residence in Madrid on Nov. 2 and robbed him of his several belongings after beating him for hours. 

During the assault, the gang covered Dentzel's security cameras and sprayed him in his eyes. Dentzel told the police that the gang held him captive and tortured him to reveal his bank accounts and passwords to the electronic wallets that stored cryptocurrency worth "tens of millions of euros,"  Business Insider reported, citing local news outlet El Espanol.

The assaulters allegedly slashed Dentzel across the chest with a knife while shooting him with a Taser gun multiple times. The torture reportedly lasted for four hours and the gang robbed his laptops, phones and a USB drive before fleeing the scene.

The police arrived at the scene when a neighbor alerted them after hearing screams from Dentzel's residence. A witness also told the police that he saw a group of masked men escaping to the street while clutching bags after the incident.

According to reports from El Espanol that quoted police sources, the gang, however, could not steal Dentzel's cryptocurrency.

Based on Dentzel's complaint, the Spanish police have started an investigation. The forensic officers have examined the crime scene to gather more information. The investigators have not made any arrests.

This file photo taken in December 2020 shows a physical imitation of a Bitcoin at a cryptocurrency "Bitcoin Change" shop in Istanbul This file photo taken in December 2020 shows a physical imitation of a Bitcoin at a cryptocurrency "Bitcoin Change" shop in Istanbul Photo: AFP / Ozan KOSE

In a massive bitcoin heist in August, Poly Network’s DeFi (Decentralized Finance) platform was robbed of more than $600 million after hackers attacked their platform. The attack has been viewed as one of the biggest cryptocurrency heists in history and the hackers reportedly used a vulnerability in Poly Network’s code that allowed them to transfer the funds to their own accounts.