A man was injured in a "heavy attack" just before Anfield, ahead of Liverpool's Champions League semi-final against Roma on Tuesday, police said.
A group of about 20 people – Allegedly referred to by several reports as Roma supporters were attacked shortly before kicking off with belts  treating police officers for injuries.
"We are investigating a man's serious robbery outside the Albert Pub on Walton Breck Rd at around 7:35 pm," said Merseyside police. "Officers appeal to anyone with information, or cell phone recordings, to contact our social media desk via Twitter @MerPolCC or Facebook Merseyside Police CC."
Problems before the game started outside Anfield when a group of Roma fans arrived via Venmore Street, embarking on the Walton Breck Rd & attack, many with belts. #LFC Fan knocked to the ground and received lengthy medical treatment. Skirmishes, projectiles, at least 1 hammer in hand, police came pic.twitter.com/Yaby4q5f0Y
– David Ornstein (@bbcsport_david) April 24, 2018
Liverpool fans avoided a repeat of the violence against the bus of the opposition, which marked their previous Champions League home game, but there were still reports of fights between the fans. A video showed how the police evicted a group when a small conflict arose in the city center.
Liverpoolers defeated the Manchester City bus before the quarter-finals and returned to the streets to play the first leg of the semi-final against Roma.
The Italian side's bus was removed from the spot where fans gathered at Anfield, but fans still gathered on police cars and blasted their own crew.
Welcome to Liverpool 1965 ? pic.twitter.com/4Q4H0damXu
– ESPN UK (@ESPNUK) April 24, 2018
– Glenn Price (@ GlennPrice94) April 24, 2018
The current scene
Name a better group of fans in the World?
LETS GO REDEMPH. pic.twitter.com/nFmWh8no3b
– Allez Allez Allez (@ AllezX3) April 24, 2018
Roma team bus arriving in Anfield pic.twitter.com/wWig3XCRQN
– Matt Critchley (@ MattCritchley1) April 24, 2018
– ESPN UK (@ESPNUK) April 24 , 2018
The police were on alert around the stadium and filmed the scenes to catch all night owls.
Following the incident against Manchester City, UEFA has been thrown onto the bus for alleged damage and unrest after cans and bottles as it drove down Anfield. The case will be heard after the season.
Liverpool coach Jürgen Klopp had asked fans to behave before the semi-final against Roma.