QPR are urging fans to come forward with information after objects were thrown at Chelsea's players after Cesc Fabregas scored a late winner and Branislav Ivanovic appeared to be struck by a cigarette lighter.
The FA is set to write to both clubs for their observations and Rangers are likely to receive censure for the individuals' actions.
QPR will be handing out bans to anyone guilty of throwing objects and have asked witnesses to come forward to identify the perpetrators.
A club spokesperson said: "The club is aware that objects were thrown by a small section of supporters towards the pitch following Chelsea’s 88th minute goal.
"The club takes the safety of all supporters and players very seriously and are currently reviewing CCTV footage of the aftermath of the goal in an attempt to identify those responsible.
“Whilst we understand that passions run high during derby fixtures, this is not the kind of behaviour the club condones in any way, shape or form.
“We take a zero tolerance approach to this sort of behaviour and, if the perpetrators are identified, they will be banned indefinitely from the stadium and, where appropriate, we will liaise with the Metropolitan Police.
“The club are awaiting communication from the FA following the referee’s report and will work closely with them in ensuring something like this does not happen again.
“We would also appeal to fans with any information regarding yesterday's incident to contact the club, as we feel it's important to identify the perpetrators as soon as possible, as we believe they are not a true representation of the QPR fan-base.”
Supporters who have information that could assist in our investigation should e-mail – firstname.lastname@example.org