Police Investigating Valley Devices Security at Happy Valley racecourse in Hong Kong is being stepped up after 12 projectile devices were found embedded in the track before Wednesday's meeting.The remote-controlled devices were placed evenly across the track at the six-furlong start in the area where the stalls were to be placed.It is reported that all but two of the metal tubes, each a foot long, contained liquid-filled syringes which would have been propelled by compressed air.The devices are currently undergoing forensic tests to determine whether the contents would affect a horses performance.'We haven't seen anything like this before,' an investigating officer told the South China Morning Post. 'We're not even sure how the device functions.'It's a very complicated piece of equipment, very sophisticated.'Commissioner of Police Tang King-shing spoke to Hong Kong Jockey Club chief executive Winfried Engelbrecht-Bresges on Thursday and assured him the incident was being treated as high priority.Stephen Chandler, the HKJC's executive director of security, added: 'It would be very premature to call this an inside job, but the perpetrator has certainly done his homework very thoroughly, and has demonstrated some painstaking research.'(C) PA Sport