Two of the suspects were arrested in connection with a polisutryckning to Bille Nielsen's home late on christmas day.
the 30-year-old had been shot in one arm, probably with a shotgun. He was then sent to the hospital.
The third person is a suspect is still on the loose.
has played three A-internationals for Denmark.
He served earlier this year sent to prison for a month after an event in Monaco, where he hit a woman. Nielsen then returned to Danish football but got during the autumn was fired from a division 1 club Lyngby.