MERSEYSIDE Police have vowed to crack down on any fan disturbances around Liverpool’s Champions League semi-final against Roma, following the ugly scenes which marred Manchester City arrival at Anfield in the previous round.

City’s coach was badly damaged by objects thrown by supporters in the street when the sides met earlier this month, which led to a Uefa charge and strong condemnation from Reds boss Jurgen Klopp.

Local police are on alert for any untoward behaviour before tonight’s last-four clash, promising a “firm, fair and friendly” approach that they hope will keep football in the headlines.

Chief superintendent Dave Charnock said: “We are expecting a vibrant atmosphere at Tuesday’s match, but our intention is that, at the end of the day, we will be talking about the game and what happened on the pitch as opposed to off the pitch.

“As always, my officers will be dealing with the fans, as they would expect to be treated themselves.

“Our policing style will be firm, fair and friendly, but we will take action where necessary against those individuals who may seek to cause problems or misbehave and spoil the evening for the majority of supporters.

“We know that this will be a busy operation and we hope that fans attending the match will act as ambassadors for their clubs and enjoy what I am sure will be a good game.

“Both sets of supporters will be delighted that their teams have reached the semis and that is an achievement worth celebrating for both clubs.”

Liverpool City Council has provided mobile CCTV to assist the effort, while specially trained dogs will be on hand to detect pyrotechnics such as fireworks and flares.