The Dutch have selected Krakow as their base for the tournament, similar to England and Italy, and trained at Wisla Krakow’s Miejski Stadium on Thursday.
They invited onlookers to watch the session, with around 25,000 spectators showing up to cast an eye over one of the tournament favourites.
However, it is believed that a group of approximately 500 in attendance were there in protest of a foreign side using the club’s facilities and subjected some of the Dutch players to monkey chants as they warmed up.
This is said to have happened at one end of the stadium as the Netherlands players did laps of the pitch, and after the second instance captain Mark van Bommel took his squad to the other end of the arena.
The Dutch skipper has confirmed that they will take this up with UEFA, and should it happen in matches they will ask the referee to end the game.
“We will take it up with UEFA and, if it happens at matches, we will talk to the referee and ask him to take us off the field,” the PSV Eindhoven midfielder said according to The Daily Mail.
“It is a real disgrace, especially after getting back from Auschwitz to be confronted with this.
“You need to open your ears. If you did hear it and you don’t want to hear it, that’s even worse.”
England are ready to allow 3,500 supporters into the Hutnik Stadium where they will train on Friday, with fears that something similar could happen.
By Gareth McKnight