In a separate incident, Spanish media showed a video of English fans pushing a tourist who was trying to take a photo into a fountain.
BARCELONA, Spain — Spanish police have detained six Liverpool fans ahead of the team's Champions League match in Barcelona on Wednesday.
Authorities say the detained fans threw objects at police officers trying to keep order as large groups of rowdy supporters gathered in Barcelona late Tuesday.
Police say one officer sustained minor injuries.
In a separate incident, Spanish media showed a video of English fans pushing a tourist who was trying to take a photo into a fountain. Fans laughed as the tourist went into the water.
Liverpool CEO Peter Moore asked fans to visit Barcelona with "grace and humility."
We proudly sing that we’ve conquered all of Europe. But let’s treat this beautiful city with the respect that it deserves, and act in a manner that is befitting of LFC. By all means have a good time, but we are Liverpool, and as such,let’s visit here with grace and humility.— Peter Moore (@PeterMooreLFC) May 1, 2019
Liverpool put out a statement Wednesday:
"Liverpool Football Club is working with Merseyside Police and the authorities in Spain, who are endeavoring to identify those involved in the incident. Such behavior is clearly totally unacceptable and will not be tolerated. It would be inappropriate to comment further while the situation is ongoing other than to confirm the club will follow due process in any and all cases of this nature."
Wednesday's match is the first leg of the Champions League semifinals.