Tottenham Hotspur manager Mauricio Pochettino has expressed his disappointment at the behaviour of three individuals who caused a halt to the Europa League win over Partizan Belgrade.
Uefa could take action against Spurs after the trio - who were each sporting Bassbuds t-shirts - caused three separate stoppages in the first half before referee Yevhen Aranovskiy temporarily postponed the game after 41 minutes.
A club statement read: "Three pitch invaders at tonight's match have been arrested and are assisting police with their enquiries. We shall provide an update as soon as we have established the full facts. We apologise to fans for the disruptions caused by this totally unacceptable behaviour."
Pochettino, after the 1-0 win saw Tottenham qualify for the Europa League knock-out stage, said: "I am very disappoint with what has happened in the first half. Personally very disappointed with the situation.
"You never know what might happen on the pitch but the behaviour was only to go in and show off. But always I am very disappointed. It is a very strange situation and very disappointing but it's important that we focus on the next game and on Sunday."
Partizan coach Marko Nikolic added: "I must say it was strange. We can think that would happen probably anywhere here in the world but not here in England, I was surprised with that. It was a bit disturbing for both sides.
"It was strange to see this in England. This is the Europa League and this is a serious competition as we cannot allow fans to be on the pitch.
"These sorts of things are happened everywhere around the world but I am not the expert. It is up to Uefa and national associations to think about this problem, it is a big problem."