The arrest was earlier reported by local media.
Nainggolan’s management team did not immediately reply to Reuters’ request for comment.
Nainggolan’s club Lokeren-Temse said in a statement that the player was absent from training on Monday morning. The club added it respected the presumption of innocence and declined to comment further.
Last year, former Netherlands international Quincy Promes was sentenced to six years in prison in absentia by a Dutch court for his involvement in smuggling of 1,360 kg of cocaine through the Belgian port to the Netherlands in two shipments in 2020.
