De Vries, 64, was taken to hospital in a seriously wounded state. He had been taking part in a live television show where he was a regular guest and was shot close to the RTL studios.
In 2019, de Vries wrote on Twitter that he had been informed by police and justice officials that he was on the hit list of a fugitive criminal.
According to NOS, de Vries had recently acted as an adviser and confidant to a state witness testifying against an alleged drug kingpin, who was extradited to the Netherlands from Dubai in 2019.
