Scottish Police Federation call for an end to the ` ` ' '' of fractious Old Firm matches . Glasgow derby between Celtic and Rangers on Wednesday marred by violent scenes . Celtic player Neil Lennon pulled apart from Rangers player and assistant manager . It is about a culture of violence fueled by alcohol . '' Scottish Police launched an investigation into the scenes ' embarrassing '
Scottish Police Federation call for an end to the ` ` ' '' of fractious Old Firm matches . Glasgow derby between Celtic and Rangers on Wednesday marred by violent scenes . Celtic player Neil Lennon pulled apart from Rangers player and assistant manager . Scottish Police launched an investigation into the scenes ' embarrassing '