A police officer was seriously injured and a number of others hurt as thousands of people gathered to celebrate Leeds winning the Championship.

A huge clean-up operation was under way in Leeds on Monday morning after an estimated 7,000 people gathered to mark the club's return to the Premier League after 16 years, leaving a sea of broken glass in a city centre square.

West Yorkshire Police said a female officer was hit by a bottle and taken to hospital with serious head injuries.

During a virtual press conference on Monday, Leeds chairman Andrea Radrizzani was asked if he had a message for fans.

Radrizzani said: "We need to be responsible. Everybody wishes to get together and celebrate and we would love to open the stadium soon.

"But if we're not following the rules and we take this superficially this might cause more cases, more problems and then we might have to postpone what we want, which is to be back at Elland Road as soon as possible.

"So I really invite them to be more cautious than they've shown in the last 24 hours. I think what I've seen is not responsible at all."