The Football Association will investigate after missiles were thrown on to the pitch during Wolves' 3-2 Premier League victory at home to Manchester City on Friday night.
An announcement during the first half at Molineux warned fans there had been numerous reports of the throwing of foreign objects.
Objects, including what appeared to be a hip flask, were hurled after Raheem Sterling had put City in front with a re-taken penalty, awarded following a VAR review, in the 25th minute.
Referee Martin Atkinson gave the object - thrown from the Wolves end behind keeper Rui Patricio's goal - to fourth official Andre Marriner, who informed security.
The FA have said they will be looking into the incident, according to Sky Sports.
Ten-man Manchester City eventually lost a two-goal lead as Wolves produced a stunning second-half comeback to win the match from two down.
Ntema97
543
rascist behaviour is slowly but surely becoming the peak of football [5percent]
zoaadkoty
342
It's called karma I can still remember when the man city fans abused Fred,he(Sterling) just stood there and enjoyed the show..I'm not promoting racism... just the truth
Allforyou123
278
glad that no one was hurt.. we love football.. let's all enjoy it in peace 😍