Barcelona players celebrating their LaLiga title win on Sunday had to leave in a hurry after Espanyol fans invaded the pitch and started running towards them.
A large group of Espanyol supporters from the "ultra" fan section behind one of the goals jumped onto the field and headed for the players who were singing and celebrating at the centre circle following Barca's 4-2 win.
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Security guards quickly intervened to keep players and the club's officials safe. Some of the guards confronted the fans, but were pushed back towards the tunnel. Riot police had to stand in front of the tunnel's entrance with shields to prevent the fans from going after the players.
The supporters threw chairs and other objects before dispersing without any other incidents.
Barcelona coach Xavi Hernandez had tried to take his players into the changing room even before the fans' actions.
"It was a moment of celebration, euphoria, it was normal, but we were not in our home and at one point I felt that it was more respectful if we went back into the locker room," he said.
Espanyol apologised for the incident at the Barcelona derby at RCDE Stadium.
"We should always condemn violence, in all aspects of life," Espanyol coach Luis GarcÃa said. "Everything was done to try to keep this from happening but it wasn't possible."
Barcelona clinched their first league title since 2019 with the win with four rounds to spare. The loss left Espanyol second-to-last.
On Monday, LaLiga opened an investigation into events postmatch and said they will work with Espanyol to identify the perpetrators. LaLiga added potential punishments will be decided in due course.
