Chelsea boss Mauricio Pochettino condemned the incident after the game, stating: "I didn't see it but I listen afterwards. My opinion? Always, I think we need to be careful, the fans need to be careful. I don't like this type of thing because it can put in danger the players.
"Of course, I am disappointed. I do not agree with this type of thing that happen in football here at Stamford Bridge and I don't agree if it happens in another stadium in England or around the world. I don't agree with this type of thing because I think it is so dangerous and I hope it doesn't happen again."