Construction workers have outrage fans of Liverpool Football Club by covering a toilet block at Anfield's main stand with "appalling" graffiti referring to the Hillsborough disaster. Other insults, including "dirty scousers" and "we'll never die", have also upset fans of the club.

The builders are working on expanding Anfield's main stand. Their handiwork was reported to the Liverpool Echo by David Mullen, the founder of a Facebook group called YNWA and Justice for the 96 – a reference to the people killed during the Hillsborough Disaster – after a member of the group posted them. He said: "We received this news which made me sick in the stomach. I hope in future people will less be likely to mock our 96 and the great club of Liverpool."

In a statement, a spokesperson for Carillion, the construction firm responsible for expanding the stand and hiring the construction workers, apologised, saying: "As soon as this appalling graffiti came to our attention we had it removed from the toilet block.

"The block is used by sub-contractors working on the site. We have instructed all our sub-contractors to make it clear to their people that such behaviour is unacceptable and that anyone found to be responsible for such graffiti will be removed from the site and not allowed on any other Carillion site.

"We have spoken to Liverpool Football Club and expressed our disappointment that this has happened. We would like to apologise to the families and friends of those involved in the terrible events at Hillsborough for any distress caused. Our people work closely with LFC and the local community and hope this unpleasant incident will not sour the good relationship we have established."

An inquest verdict delivered in April found that the 96 Liverpool fans who died at the Hillsborough Stadium in 1989 in Sheffield had been unlawfully killed after a series of police failings, ending a 27-year legal battle to assign responsibility for their deaths. David Duckenfield, who commanded South Yorkshire's police forces during the match, was accused of gross negligence, overturning previous claims by the authorities that Liverpools fans were to blame for the deaths.

Hillsborough Disaster
Supporters pay their respects after the Hillsborough disaster at Anfield in Liverpool Pascal Rondeau/ Allsport