Cycling fan admits throwing bottle at Van der Poel was 'stupid'
The Lille public prosecutor's office confirmed on Monday that it had opened an investigation into "violence with a weapon", while the 28-year-old man who threw the bottle handed himself in to Belgian police.
Dutchman Van der Poel went on to win the race for a third straight year.
"I'm so happy that he crossed the finish line first on Sunday, despite my stupid gesture," the fan, who admitted he had "drunk a lot", said in a letter published by Belgian daily Het Laatse Nieuws on Wednesday.
"But at the same time...