The Brazilian right-back caused anger by appearing to immitate someone of Arabic origen, while holding a box of explosives.
After a picture tweeted by Bayern Munich, which was later deleted, showed Rafinha dressed in traditional Arab clothing, wearing a fake moustache and with a box in his hand that said the word 'vorsicht' - meaning 'caution'.
The Brazilian has now apologized, tweeting: "Halloween is a scary celebration with exaggerated costumes. It was not my intention to anger anyone through my disguise or hurt someones feelings."
November 1, 2018
He has made nearly 250 appearances for Bayern since joining in 2011 from Genoa.