Merseyside police confirmed on Sunday that a 19-year-old man had been charged with criminal damages after fireworks struck the Liver building.
And now images have emerged of a group of smiling men showing a police hat with white powder on it.
The clip, which was posted on Twitter, shows two members of the group appearing to be sniffing.
As of Friday evening, there was disorder in the Pier Head area of the city, including minor clashes between police and revelers.
This happened 24 hours after the defeat of Manchester City to Chelsea confirmed a first Premier League title for Liverpool.
The club issued a statement, in collaboration with Merseyside police and Liverpool city council, condemning the “totally unacceptable” actions of some of their supporters.
He said: “Throughout the past week, the Liverpool Football Club, Merseyside police, Liverpool city council and Spirit of Shankly have been working together to constantly remind people that the region is still disproportionately affected by COVID-19 pandemic and ask people to celebrate the Prime Minister of LFC. The title of champion wins safely.
“Several thousand people showed up at Pier Head on Friday, June 26, and some chose to ignore advice on social distancing and risk public safety.
“Our city is still in a public health crisis and this behavior is completely unacceptable.
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“The potential danger of a second COVID-19 spike still exists and we must work together to ensure that we do not undo everything that was achieved as a region during the lockout.
“When it is safely possible, we will all work together to organize a victory parade when everyone can come together to celebrate.
“Until then, the safety of our city and its people continues to be our number one priority. “