Chelsea defender Branislav Ivanovic was the subject of a pelted missile allegedly thrown by QPR fans in his side's 1-0 win at Loftus Road on Sunday.
The Serbian defender was hit with what appeared to be a lighter as the Blues players celebrated Cesc Fabregas' 88th minute winner in the West London derby and the act was condemned by R's manager Chris Ramsey.
After the game, Ramsay criticized the incident and said these sorts of people are not welcome at the club if they are to behave in such a manner.
When asked about the incident, Ramsey said: "We don't want objects thrown on the pitch, these rivalries can sometimes go too far.
"I don't know what happened and I didn't see it but, if that's the case, we don't want those people back in the club."