The head of Scotland's biggest police force has blamed "ridiculous" alcohol deals in supermarkets for fuelling violence and disorder.
Chief Constable Stephen House of Strathclyde Police told the News of the World that pre-loading on alcohol leads to "disgraceful" behaviour.
"Quite simply, the booze in supermarkets is cheaper than in the pub. That has to be balanced in some way.
"At present we have ridiculously cheap booze out there which people are necking as fast as they can. Every weekend we see the damage. Typically, there will be around 20 serious assaults, a couple of attempted murders and a couple of rapes.
"It is rare that drink is not involved in every single one. It can't continue."
He added: "Make no mistake — cheap vodka is fuelling this. But we don't seem to be able to do anything about it.
"The licensed trade have got their act together and are running pubs well. But supermarkets are selling drink at just ridiculous prices. They have to ask themselves if they have any social responsibility for people once they go beyond their car parks."
The Scottish National Party wants to introduce minimum pricing north of the border to tackle the problem.