Scottish Police Federation call for an end to the `` madness '' of fractious Old Firm matches . Glasgow derby between Celtic and Rangers on Wednesday marred by violent scenes . Celtic manager Neil Lennon pulled apart from Rangers player and assistant manager . The violence erupted after a goal was disallowed in injury time when Rangers' defender Steven Davis tripped over Celtic striker Leigh Griffiths as he tried to clear a cross.
Scottish Police Federation call for an end to the `` madness '' of fractious Old Firm matches . Glasgow derby between Celtic and Rangers on Wednesday marred by violent scenes . Celtic manager Neil Lennon pulled apart from Rangers player and assistant manager . Scottish FA launch an investigation calling the scenes 'embarrassing '