Prosecutors in Holland have opened an investigation after a second tier match was suspended for racist abuse.
Sunday's fixture between FC Den Bosch and Excelsior Rotterdam was held up for half an hour after the away side's striker Ahmad Mendes Moreira was abused.
Moreira, whose parents hail from the West African nations of Bissau-Guinea and Guinea, said he was called a "negro and cotton-picker" by fans from the beginning of the game.
With the scores at 1-1 earlier in the match, Moreira gave away a foul over by the touchline, before he was shouted at by Den Bosch supporters sitting nearby - which forced an angry reaction from the player.

He was escorted off the pitch by sympathetic teammates before a lengthy break, during which the match looked as though it could be abandoned.
However the game soon resumed and Moreira quickly provided the best response, scoring and cupping his ears in celebration.
Objects were hurled at the 24-year-old and his teammates as they celebrated.
Dutch football association KNVB said it would investigate the incident and look into possible sanctions against Den Bosch and its supporters.
"Together with the club, we will do everything to track down who did this", the KNVB's league director Jan Bluyssen said.
Den Bosch coach Erik van der Ven blasted Moreira as a "pathetic little man" for his actions during the match.
Speaking in a post match press conference, Moreira said: "That just hurts me a lot."
"I'm just very angry and very sad that these things still happen."
Former Man Utd star Memphis Depay reacted to the incident on social media, tweeting: "I'm sick and tired to see these images over and over! When is it going to stop!!? #SayNoToRacism."
He then tweeted the Dutch FA, saying: "What we going to do? Specially with the upcoming Euro 2020?"
Den Bosch released a statement after the fixture condemning the behaviour of their fans.
It read: "Let one thing be clear; FC Den Bosch distances itself from everything that has to do with this and acts strongly against stadium visitors who are guilty of this."
The match eventually ended in a 3-3 draw, after Excelsior fought back from 2-1 down following Moreira's goal, and then levelling late on through Ruben Rodrigues.