The nine – all associated with a company that maintained the bridge in Morbi -- were being investigated for culpable homicide not amounting to murder, senior police officer Ashok Kumar Yadav said in a statement.CCTV footage showed the structure swaying – with a few people apparently deliberately rocking it – before it suddenly gave way."I saw the bridge collapse before my eyes," said one witness who worked all night on rescue efforts, without giving his name.The Gujarat tourist department describes the "grand suspension bridge" about 200 kilometres (120 miles) west of the state's main city, Ahmedabad, as an "artistic and technological marvel".Reports named the firm that carried out the repairs as a unit of the Gujarat-based Oreva group, which describes itself as the world's largest clock manufacturer, and also makes lighting products and e-bikes."